Q & A


Can Polyester be used outdoors?

Polyester resin are by nature very rigid glues that once cured don’t give way to expansion and contractions due to different temperature variations. Although they can sustain pretty high temperatures before they start softening and eventually melting, the polyester tends to be very brittle when exposed to below freezing temperatures. This will make them prone to delamination if used to glue stone together.  Epoxy resins instead are better suited for outdoor applications. Their chemical composition is such that they are more elastic and can expand and contract with the stone through the changing of seasons.

What is the best adhesive to use for fireplaces?

Polyesters can sustain temperature of up to 212 degrees F without losing its characteristic. It is important though that the glue itself is not exposed to direct flame. If the stone will reach more than 212 degrees we recommend using only mechanical anchors. Epoxy should instead be avoided, because although it is stronger glue than polyester, the maximum sustainable temperature is only 65 °C or 149 °F. Above this temperature the glue will start to soften up and potentially lose its structural strength.

What should I use for laminating?

To laminate granite Tenax recommend different products: If an epoxy is preferred the product of choice is the Epoxy Resin Strong Edge. This is a transparent 2:1 ratio, medium time setting, epoxy resin.

If a faster speed is required we recommend a premium polyester like Polytenax  or Crystal knife grade. The use of regular polyester transparent, although mainstream in fabrication lamination due to its ease of use, fast cure time, and less expensive cost, it is to be used with caution, since especially on granite the high concentration of silica and quartz might have an inferior strength then a higher quality glue. The use of colored polyester resin in granite is highly discouraged, since the glue has fillers in it that will diminish its natural strength. These polyester resins can be safely used only on engineered stone (where Tenax has developed a complete line of pre-mixed color that will match the main quartz surfaces on the market) and on marbles.

What should I use for the seams of a countertop?

Seams usually are joined together using a regular polyester glue. Tenax manufactures one of the strongest polyester on the market. Its commercial name is Knife Grade Tixo and Knife Grade H. Premium polyesters like Crystal or Polytenax can also be used for Granite and Marbles. For white marbles instead we recommend Glaxs resin, since it is the only glue that will not leave an unappealing “wet” joint around the seam.

Can I use polyester colors with epoxy glue?

Coloring paste are usually pre-mixed part A resin with the color oxides. It is a good practice to use polyester coloring paste with polyester glues and epoxy coloring paste with epoxy glues only. If necessary you can use the Universal color made with an epoxy resin in the polyester mixture but not the other way around. Epoxy glue is a more precise chemical reaction and adding a polyester substance might create a problem for achieving the best final results.

What is a good way to estimate how much hardener to use with my polyester glue?

The right ratio in weight between the glue and its catalyst is 3%. We recommend the use of a digital scale the first time to make sure you calibrate your “eyeballing measurement”.  If a digital scale is not an option then a good rule of thumb is: A grape for an orange

Do I need to have the exact ratio for epoxy glues or just get as close as I can?

For epoxy resin the right Ratio is extremely important.  The ratio recommended for an epoxy should always be measured with a digital scale. Guessing in volume might reduce the accuracy of the final mix and leave you with a non-complete cure of the mixture. For Tenax epoxy systems the part A is always assumed to be 100 parts and the corresponding part needed in weight of part B is specified in the name of the product itself.

If you are using for example the resin 5040 together with the BM40H hardener , you would have to measure 100 parts (grams works best to use on a digital scale) of part A and 40 parts of part B. Be careful of not assuming that 40 is referred to the percentage of the total amount but to the percentage of the part A. Meaning if you want to mix 100 grams total of epoxy part A will only weight 30 grams…

What is the strongest epoxy that Tenax makes?

Tenax makes different epoxy glues that will give you the strongest results when joining together 2 different pieces of stones. Domo 10 is one of the strongest epoxy available on the market. Its other main characteristic is that it contains an ammine that allows the Domo 10 to be used also when the material to be glued together is still wet. To break it apart you need a force of about 10 MPa or about 1450Psi. If instead a transparent (water clear) glue is needed, then Tenax Strong Edge would be recommended.

Can Tenax epoxies be used for underwater applications?

Once cured both epoxy and polyester glue can be submerged underwater.

What is the difference between “H” polyester knife grade and “Tixo” polyester knife grade?

Both Tixo and knife grade H are made with the same basic raw material. The major difference between the 2 is the Appearance. The reason why they look and feel different is in the way they are manufactured. Knife grade H is what is used in the majority of the rest of the world. It is made by a “warm” process, where after the glue has been made it moves freely in special tubes until it is poured in the cans. There it slowly solidifies and becomes the knife grade consistency we are all aware of.

Tixo instead is made with a “cold” process, where it is extruded from the reactor and “pushed” into the can. This process, although it leaves the glue softer, it also reduces even so slightly, the chemical strength of the products and the transparency. On the contrary the H, although is stronger and more transparent it has the characteristic of having little bubbles of air trapped in the surface leaving it a little bit gritty at touch compared with the TIXO. But by simply mixing it for 1 minute will eliminate the bubbles.

Should I use Tixo or “H” if I need a knife grade?

There is practically no difference in performance. This strictly comes down to preference and personal taste.

Tixo is a little smoother H is a little thicker. Click Here to see a video of the difference.

Both Tixo and knife grade H are made with the same basic raw material. The major difference between the 2 is the Appearance. The reason why they look and feel different is in the way they are manufactured. Knife grade H is the most popular Knife grade that is used around the world. It is made by a “warm” process, where after the glue has been made it moves freely in special tubes until it is poured in the cans. There it slowly solidify and becomes the knife grade consistency we are all aware of.

Tixo instead is made with a “cold” process, where it is extruded from the reactor and “pushed” into the can. This process, although it leaves the glue softer, it also reduces even so slightly, the chemical strength of the products and the transparency. On the contrary the H , although is stronger and more transparent has the characteristic of having little bubbles of air trapped in the surface leaving it a little bit gritty at touch compared with the TIXO.

Can I laminate with Polytenax?

Absolutely. Polytenax is a top of the line polyester that is safe for laminating granite, marble and all other stones. It is really fast and is one of the strongest polyesters on the market.

If Domo is exposed to sunlight, will it get brittle and fail?

Like any epoxy Domo 10 is not UV stable. That only means that its color will change with exposure at the UV rays and will darken up. Sun doesn’t affect its strength though and its chemical and physical characteristics will stay the same.

Can I resin a slab or countertop in my own shop?

Yes but is not an easy task. First of all you have to have a means of repolishing the slab like a single head or “manettone” available. Also you will need some space to lay the slab down when waiting for the resin to cure. Most importantly you will need a working environment with a temperature of at least 75 degrees F and very low relative humidity in the air (20% is recommended).

Tenax Makes epoxies with a 1:1 and 2:1 ratio: How do I Choose?

Epoxies have very different ratios depending on the chemical composition and formula. All epoxies must be mixed with a certain degree of precision to be able to set correctly.

The ratio given is always intended in weight and not in volume.

To have less chance to make mistakes, especially for those customers who like to “eyeball” the right amount of part A and B, Tenax formulated easy to mix 1:1 and 2:1 ratio epoxy glues. The more popular 1:1 ratios glues are: Domo 10 and Rivo 50. When using epoxy system for surface resin treatment instead, the ratios vary greatly. Dealing with Tenax epoxy, you must always assume the resin as 100 parts in weight and the hardener in the quantity implied in the name itself. For example if you are using the hardener BX35h, the right amount would be 35 parts for every 100 part of resin, while if you were using the BB25m the parts to be mixed would be 25 (100 parts A and 25 parts B). This must be weighted on a digital scale preferably using grams as a measurement. Adding more hardener to the mixture WILL not speed up the reaction but only leave the mixture incomplete, thus not allowing to properly cure.

The great thing about Tenax epoxies is that the ratio is already predetermined for you. Tenax manufactures different epoxies for different applications. Depending on the specific application that you are needing, simply select the correct epoxy for that application. The mix ratio will already be supplied with that epoxy.

Does Glaxs ratio really have to be so accurate? Do I really have to weigh it on a scale?

Unlike polyester and epoxy adhesives that allow a small “fudge” factor, Tenax Glaxs is a bi-component adhesive that MUST maintain an exact mix ratio. That ratio can be 100:70, 100:65 or 100:60. Like with epoxy the name of the material always refer to the correct amount of hardener for 100 parts of resin part A. If the ratio is not followed specifically, Glaxs will not have performed with the desired and specified results.

However, to assist you in this exact mixing, Tenax has created per measured kits. They are either in a special 2 plastic can kit (400 grams total amount) or in pouch kits (100 or 200 grams size). These kits are designed for single job use. Simply, squeeze one end of the pouch to break the center seal that separates the A from the B and squeeze it all together and mix well for approximately 1 min. Tear the pouch at one end and squeeze out the Glaxs onto the stone application. Easy, fast, and mess free!

I opened a can of adhesive and it was hardened up. What should I do?

Do not use the adhesive. This is usually caused by 1) the adhesive being left in extreme temperatures, 2) the adhesive not being resealed tightly, 3) the adhesive not being used within the shelf life period, 4) after you used the can for the first time, the product was contaminated with some hardener.

Please contact the distributor that you have purchased your adhesive from or contact Tenax at 1-800-341-0432

Why are stones resined at the factory or quarries?

There are a couple of reasons why factory’s and quarries resin slabs. 1) Resins strengthen stone. This allows the slabs to come in larger sizes. It also allows very fragile stone that would simply fall apart come to market as it consolidates and strengthens the material. 2) In a typical mountain of stone, there could only be 20% of A grade material, 30% of B grade material and 50% of C grade and worse material. By resining the stone, a factory or quarry can improve the quality of the B and C grade material to A grade allowing greater yield out of the mountain. This, in turn, allows for more stone production and lower prices for slabs. This is just 2 examples of the logic behind resined material. 

Can Tenax Glues, Sealers, and other chemicals be shipped by Air?

Chemicals are not very friendly for the sky. Government regulations require that all corrosive and flammable materials be properly labeled for air shipments.

These are considered hazardous materials. It is possible to ship them by air when properly packed and only in certain amount depending on the hazmat classification. The distributor must also have special training and hazmat fees will be charged in addition to regular shipping fees.

There are only a few items that Tenax manufactures that can be shipped via air without hazmat fees: Color paste, Glydex and Ager H20, as well as Tenax Abrasives, etc. There are times that a project is extremely urgent and product must be received ASAP. Please contact Tenax and we will connect you with the nearest distributor that can provide the product as soon as possible. If an air shipment is necessary, Tenax can connect you with a distributor is approved to ship Tenax products by air.

Why does Tenax Crystal use the water droplet hardener?

Tenax manufactures products for very specific applications. Tenax Crystal , in flowing and knife grade consistency, was designed to create a very clear cure. This allows the application of Crystal to be used in filling chips and holes as well as producing clear seams where a color is not preferred.

When hardener and adhesive is mixed together, a chemical reaction occurs, allowing the adhesive to cure. In traditional polyesters using the white hardener, the chemical reaction is very fast and generates a lot of heat. This heat turns the adhesive a yellow color. In general, the faster a polyester chemical reaction occurs the more heat is generated and the more yellow an adhesive turns. This reaction takes place within 6-15 minutes.

Crystal uses the water droplet hardener or MEK. The water droplet, designed specifically with the Crystal chemical makeup is designed to drastically slow the cure time, and heat, of the chemical reaction. This allows the Crystal to cure slowly without as much heat. This keeps the Crystal nice and clear after curing. Crystal takes approximately 2 hours to cure at 80 degrees F. 

I applied the hardener to Crystal but it will not harden

Crystal is a slow curing adhesive. There are several things to check. 1) Was the correct amount of hardener used? Unlike the white hardener used in polyester, a correct 2-3% in weight of hardener must be used. The best way is to use a small scale to weigh out the Crystal and apply the correct percentage of hardener. 2) What is the temperature of the air and stone? The cure time is based upon 72 degrees. If the stone or air is colder it will slow down the cure time.3) how old is the hardener? MEK tends to have a shorter shelf life then crystal itself. Always make sure you have a fresh batch of hardener when using water clear products.

What is the difference between Rivo 15 and Rivo 50 ?

Rivo 15 and 50 are very closely related. They are both the same color, come in the same size containers and have the same 1:1 mix ratio. Both are structural strength epoxies. The main difference is cure time: Rivo 15 as a gel time of 15 minutes in bulk (where the 15 comes in) and cures in about 90 minutes. Rivo 50 as a gel time of 50 minutes in bulk (yes also where the 50 comes from) and cures in about 150 minutes. This change in gel and cure times allows flexibility in applications. In thin layer the reaction speed is slower and like any other epoxy the reaction will not take place at all below 60 degrees F. To speed up the reaction heat must be used to warm both the product and the stone.

What is the difference between Epoxy Gel and Micto ?

Tenax Micto is a fast water clear flowing epoxy with a 1:1 mix ratio. It cures in about 15 minutes. It is designed to fill cracks as well as be a structural adhesive. It can be used for laminating. It is considered an “emergency” glue, used to patch or fix stone when speed and strength are a must.

Tenax Epoxy Gel is a bi-component epoxy designed for gluing , laminating, and seaming stone. It is a knife grade consistency. 2:1 mix ratio. Gel time in about 5-10 minutes and cures in about 1 hour.

What’s the shelf life of polyester and epoxy adhesive?

Many things can change the shelf life of an adhesive. Where is the product stored? Is it exposed to extreme temperatures? Has the can been opened? What is the humidity where it is being stored? Is the can be exposed to direct sunlight? All of these questions can drastically change the longevity of  both polyester and epoxy adhesives. In general, if an adhesive is stored between 65-77 degrees and kept away from direct heat, humidity and sunlight, an adhesive will have a shelf life for at least 1 year.

What is the difference between polyester and epoxy glue?

Polyester and epoxy glues are 2 different families of products and have  different applications. Polyester is designed for to repair, rebuild, bond, and fill stone. Polyester cures more quickly, usually in about 15 minutes, is polishable, and colors easily.  Polyesters become very rigid and since its structure won’t allow the usual expansion and retraction of the stone during freeze-thaw cycle, it is strictly for indoor use. Some polyesters are not UV stable. Polyesters come in a variety of colors and consistency.

Epoxies are instead designed to be structural adhesives. Epoxies can bond to almost any surface. Some may even be used on both wet and dry surfaces (like DOMO 10 or Kotor20). Epoxies bond the stone so strong that the stone will break before the bond will. Epoxies may be used in both indoor and outdoor applications since they are generally more elastic then polyesters. Epoxies generally take 2 to 24 hours to cure. Epoxies are VOC free but they are not UV stables.

These are the general features and functions of polyester and epoxy adhesives. For both of these adhesives, Tenax manufactures a variation of products that push outside these boundaries for specific applications. For more information please visit http://www.tenaxusa.com/. Or you may contact us at info@tenaxusa.com or call 1-800-341-0432

Can I apply a polyester adhesive to a wet stone?

Due to the chemical make-up of polyester glues, the stone must be clean and dry to achieve the highest level of adhesion. If the stone is damp or wet, the moisture will prevent the adhesive from properly adhering to the stone.

Should I use polyester or epoxy for rodding?

Rodding has proven to be a great way to substantially increase the strength of counter tops. Both polyester and epoxies have been used for rodding purposes. Tenax has done exhaustive testing for the perfect combination of rodding and adhesive. Tenax used metal, fiberglass, and carbon fiber rodding using polyester and epoxy adhesives in a very controlled environment. With all 3 materials, polyester drastically increased the strength of the stone over using nothing at all. Using epoxy further strengthened the stone. The absolute best combination was using carbon fiber rodding along with Tenax Strong Edge Epoxy adhesive.

Does cure time affect the strength of glue?

Cure time of adhesives are largely based upon the formulation and purpose of the adhesive. In general it is a true statement to say that the faster the bonding, the less the strength of the adhesive. This is because the longer the glue remain liquid, the better the penetration will be with the substrate, thus the stronger the bond will be. However bonding strength depends a lot on the  formulations and the reason why they were created is the most important feature as to the strength of the glue, not particularly the cure time. In general, polyester is the fastest setting glues. The cure time range from 8-15 minutes (there are some exceptions to this rule). Polyester is designed for to repair, rebuild, bond, and fill stone. With excellent adhesion, polyester will provide a very strong bond for its intended purpose. However polyester in general is not made to be a super strong structural adhesive. For its intended purpose, polyester will cure fast and still have a very strong bond.

Epoxies, however, are specifically designed to be structural adhesive. Epoxies bond the surface so strong that once cured it is practically impossible to break it loose. Epoxies generally take 2 to 24 hours to cure.

In view of the foregoing, epoxies cure at a much slower rate and are some of the strongest glues on the planet. Polyesters cure much faster but are not as strong as epoxies. 

I need to fill holes in travertine. What should I use?

Tenax manufactures a semi-solid adhesive designed specifically to fill travertine. Tenax Travertine Filler comes in 3 different shades: Buff, Brown, and Grey to color match the shades that travertine typically comes in. Simply add the provided hardener that comes with the Travertine Filler, mix and spread into the holes in the travertine using a putty knife, trowel, or other applicator. Once the travertine initially starts to gel, scrap off the excess and allow the Travertine filler to dry.

What is the application process for the travertine fill?

Wash Dry and Vacuum the floor.

Add a little 3% hardener to a small amount ( table spoon ) of travertine filler.

Fill tile using a putting knife.

Scrape excess using a spatula before the material cures +/_ 5 Minutes after application

Buff and Polish after the travertine filler is fully cured 1 Hour.

Can I color the epoxy?

Yes epoxy can be colored with Universal coloring paste or liquid pigments Tepox V.

Liquid pigments Tepox V dissolve better in liquid epoxies .

Colored Paste Pigments Universal dissolve better in knife grade epoxies.

Will Tenax epoxies change color outside?

All epoxy will change color when exposed to UV Rays. We manufacture some that are less affected by the sunlight but overall you can expect a yellowing effect due to sunlight.

We have other product ( not epoxy ) that is color stable:

Crystal has a special ammine inside that reduce yellowing.

Glaxs instead is 100% UV stable

Does Tenax have a UV stable epoxy?

UV epoxies for the stone industry are not UV stable. Epoxies could be made UV stable but with a very great price increase 300% or more.

We have other products ( not epoxy ) that are color stable:

Crystal has a special ammine inside that reduce yellowing.

Glaxs instead is 100% UV stable

What adhesive should I use in a shower application?

Fixtop 2 Part Epoxy Thinset.

Fixtop is very strong and ideal for vertical as well horizontal application.

Fixtop can be used for backsplash as well glass tiles.

I make stone sinks. Would you recommend Polytenax for this application?

Polytenax is a good choice ( Premium Polyester )

Best Choice is DOMO a 2 part Epoxy designed to stand extreme force and low temperature.

What are the shelf lives are of opened versus unopened cans of adhesive?

12 Months from manufacture production date for unopened containers.

Why or when should I purchase a pre-colored adhesive like the buff or white flowing?

When filling or gluing travertine the buff color glue will blend with material perfectly .

White colored glue is a good product to use when trying to match some light color engineered stone.

White can be the base color to start with when trying to match hard to match engineered stone colors.

There are some strong similarities between Thassos and Crystal knife. How do I choose?

Thassos is a polyester less strong and a little cheaper. Thassos is about 20% faster than Crystal. Crystal has a UV inhibitor inside.

Thassos is mostly to be used on marble .

Crystal on the other hand is approved to be used on Granite and will not darken.

Does Tenax have a product that can fill small pits on an installed countertop?

TEFILL is the ideal product for this application.

Tefill is CA or cyanoacrylate glue is a convenient package.

1 Gel glue

1 Liquid Glue

1 Activator

What product is needed to fill a scratch on my countertops?

TEFILL is the ideal product for this application. Tefill is CA or cyanoacrylate glue is a convenient package.

1 Gel glue

1 Liquid Glue

1 Activator

I have a chipped edge on my countertops, what do I need to fix it?

Glue it back with an epoxy Domo / RIVO / Epoxy Gel and then use Tefill to hide the crack…

TEFILL is the ideal product for this application.

Tefill is CA or cyanoacrylate glue is a convenient package.

1 Gel glue

1 Liquid Glue

1 Activator


What is the difference between Ager and Ager Tiger?

Ager Tiger is a slightly different formula than Ager. Tiger is formulated specifically for use on the edges of resined exotic stones when matching the resined top to the unresined edge. Exotic stones are created with a very different combination of materials that have a lot of micro fissures and natural porosity. If Tenax regular Ager was to be used, it’s very thin viscosity will make it penetrate and soak deep into the stone, leaving the surface of the edge basically unchanged. The different formulation in Ager Tiger allows it to soak in the surface just enough to give the wet look and match the color of the surface with the edge.

Standard Ager will have a better absorption and penetration rate on highly polished surfaces where it would be difficult to have any sealer penetration at all. Both Ager and Ager tiger are excellent sealers as well, so the surface treated doesn’t have to be sealed after the color enhancement is achieved.

Can Ager be used on flamed, brushed, or honed stone?

Yes Ager or Ager Tiger can be applied to all these finishes. Ager Tiger may be more suited to these porous finishes. As usual we recommend applying ager, letting it sit on the surface for a couple of minutes and then remove all the excess with a clean rug or cotton cloth. If any excess is left on the surface it will eventually glaze on top and would be very difficult to remove after curing.

Do I have to seal the stone after applying Ager or Ager Tiger?

No. Both ager and Ager Tiger are excellent color enhancing SEALERS. This is the only sealer you need!

Is Ager and Ager Tiger safe to use on a fireplace hearth? 

Yes, but only after it dries.While Ager is wet, it is highly flammable.But once it dries, it is not flammable and can be used in this application.Allow 24 hours to cure fully before using the fireplace.

How do I remove Ager or Ager Tiger?

Until recently there was no safe effective way to remove Ager or Ager Tiger after it is cured. It is meant to provide a high level of protection and thus designed to stay put. However now there is Tenax Ager Remover which is designed to remove the excess Ager left on the surface by over application or by allowing Ager or Ager Tiger to dry on the surface.

When should I use Ager Tiger instead of Ager?

When matching an edge to the top of a resined slab or giving a “wet look” to exotic or porous stones. The enhancement is darker and the different formulation of the Ager Tiger allows it to hang in the open pores better instead of wicking further into the material. This also means fewer applications. Keep in mind that Standard ager does however penetrate better on polished surfaces.

How long will Ager last outside on honed stone?

It’s impossible to say with the many variables that are encountered in an outdoor application. Ager Tiger is the better choice given the porosity of the stone and the UV exposure it will be subject to. Also it is important to know if the material is going to be walked on or is going to be applied on vertical surfaces. On Vertical surfaces, we have applications that have weathered the elements for more than 5 years without needing a second application. If the application will be applied on an outside high traffic area, it might be necessary to reapply it every year or as needed .

I applied Ager in excess and it dried on the surface, how do I remove it?

Ager is a very strong stone color enhancer. It is designed not to be removed. If a spill occurs on a stone, use acetone immediately (within 1 minute) to not have the Ager change the color of the stone.

If Ager has been applied on the stone and excess has dried on the surface, unfortunately it is extremely difficult to remove. Depending on how much of Ager was left on the surface, there are a few things that can be done to try and remove it:

1) Mechanically remove it with razor blades, scrapers, etc.

2) Abrasives such as steel wool or abrasive pads.

3) Chemicals such as Acetone or Tenax Hydrex have had some success under certain circumstances.

In these 3 instances, please use caution to not damage the surface of the stone.

The sooner the Ager is removed after application, better results may be achieved.

4) The last resort would be to remove the top of the stone with sandpaper, diamond pads, etc. to completely remove the Ager and then reapply. This would be done by a professional stone fabricator.

What is the solvent base in Ager and Tiger?

  Ager and Ager tiger are a special resin dissolved in a mixture of solvents. The formula is a proprietary secret recipe that our competition would love to get their hands on!

Can I use ager on soapstone instead of oil?

Oils are used to darken soapstone and also fill up the already dense pores to prevent any stains from penetrating. Ager is a very effective sealer and darkener on soapstone and can be used in place of oil. The main difference is that mineral oil will dissolve with an alcohol base cleaner, while ager will be a more permanent solution. As always you will need to test in a small inconspicuous area to make sure you like the effect it gives.

Will ager or Ager Tiger penetrate a polished top?

Yes. As always the absorption rate depends on the density and porosity of the stone. Ager is the best choice for polished surfaces as it has a special formula that allows greater penetration.

Customer does not like the look of Ager, it darkened the stone, and how do I remove it now?

It cannot be removed if it has been applied more than a few minutes. If this is not the case, acetone in some cases can remove the sealer but only if it is applied immediately after ager has been applied. We reckoned to ALWAYS try the product on a hidden piece of stone to make sure your customer like the final look and approve the “wet” effect. 

When is the best time to apply ager on the edge, before or after polishing?

The best time to apply is when the pores of the stone are still open and the finish is past the grinding stage, just after the 400 grit is a good time to apply. This allows the ager to “wick” deeper and holds fast the color. Just make sure the stone is completely dry before you apply the Ager to it. Polishing can then be completed leaving the color enhancement in tacked.

Are your sealers food safe?

Yes. We have a variety of sealers that have been approved by the EC for food contact. Usually when the sealer has cured and is inside the stone there is no transfer of molecules from the stone to the food if left on the counter. For specific request we are available to provide a specific European community certificate of safe for food contact for the majority of our products. Drexy and Gear are 2 of the most common sealer already approved and with the seal on the can.

What is the best way to apply Tepox V?

  Tepox V can be applied undiluted directly to the stone by wiping it on with a clean rag, painting it on with a brush or sponge. Wipe off the excess after a couple minutes. Tepox V undiluted will give a much more drastic effect of coloration. After application, ager or will need to be applied over the Tepox V it in order to drive the color deep into the stone for permanence. For softer coloration Tepox V can be diluted in ager or Ager Tiger. The recommended ratio is 70% ager to 30% Tepox V.

Can Tepox V be used outdoors?

Like any other pigments UV can really play an effect on how much the color is lost due to sun rays. There are some clients who have used it and swear by it, but always be aware about the location of the stone and if possible make a test to make sure it doesn’t fade away. In an outdoor application use it along with Ager Tiger which is more suited in that environment.

Will the color of the Tepox V fade over time?

Under normal circumstances for inside jobs and used with proper  application it will not.

What is the best application process for the Tenax Polishing Powder?

The polishing powder is meant to remove super fine scratches and restore a high polish. First Mix the powder into a paste with water. Apply the paste to the affected area of the stone. Now using a felt buffing wheel work the paste over the surface applying pressure and allowing some of the moisture to dry in the paste and slowly generate some heat. Do not allow the paste to overheat but add a little more mixture as necessary. Rinse clean after sufficient buffing to see results and repeat as necessary till a high polish is achieved. To not burn or over heat the powder.

When should I use Tewax paste wax?

Wax gives you a last finish touch to a polished surface. It helps increase the polish.

Wax will only last until is removed.

Wax is the easiest way to temporarily restore luster and intensify the color of your surface.

How long does the wax last?

Can Tewax be removed by any daily cleaner and/or solvent.

Wax will only last until is removed.

Wax is the easiest way to temporarily restore luster and intensify the color of your surface.

Why do I need uniblack 2 or can I just reapply Uniblack1?

Uniblack 2 is the maintenance product after you apply uniblack 1 , Uniblack 2 is the equivalent of a liquid black wax.

Uniblack 1 will intensify the black in some dark material and repair certain imperfection ( natural or manmade ).

Apply on the area you need to repair with a nylon brush let it stay for 10 minutes and remove with 000 steel wool.

If necessary reapply Uniblack 1.

Uniblack 2 will maintain the result achieved with Uniblack 1.

Will cleaning agents pull Pectro out of the stone exposing the pits and fissures again?

Pectro is the product of choice when trying to hide imperfections like fissures and spider webs.

After Pectro or Pectro black is applied make sure you seal Pectro with either Ager or Proseal to fix it on the material

Daily cleaning product should not remove it.

Will Lustro Italiano Cleaner hurt my stone countertops?

Lustro Italiano cleaner was designed specifically with granite, marble, travertine, limestone, engineered stone, etc. in mind. Lustro Italiano Cleaner will not hurt the surface of your stone. It’s slightly alkaline formula will not etch marble and its degreasing property will leave the surface clean and streak free.

I have a bar top, or stone overhang is not polished and it can be seen. Do you have a product that will make a stone look polished?

Tenax manufactures a product called Telux. Telux is a topical self autopolish. Some have called it a “varnish” for stone.

Telux is applied to the surface of the stone(for best applications this would be applied before the stone is installed so that the Telux can sit on the stone while drying). Telux will create a coat on top of the stone. It will enhance the color of the stone, fill in the rough texture of the surface, and create a polished look.

Telux is also excellent for chiseled edges as well.

For stone that has already been installed, Tenax also makes Jet Spray, an aerosol self polish.

Can Telux self polish varnish be used on floors?

NO it will not provide a very long lasting finish.

Telux will be a coating between the hard stone and foot traffic and will get scratched very easily.

Telux is ideal to use in area that are hard to polish but receive very little use.



What is the best way to hone a slab?

It’s all according to the type machine you have. Generally speaking you need to start using coarse grit abrasives to smooth out the stone or remove the polish and then start using finer abrasives until the right finish is obtained. We always recommend using the 120 and 220 air flex brush at the end of the process to be able to clean up the surface from the rotation marks and leave a clean, uniform Matt finish.

I have a multihead line machine. Does Tenax make abrasives for this machine?

Absolutely, Tenax is the world leader in surface polishing, manufacturing many different type attachments available. The most common and readily available ones are the 14 cm Fickert style abrasives, the Frankfurt style abrasives, the Terzaggo rolls and the Cassani bricks for concrete polishing.

Tenax has more than 1 million dollars of inventory at all time in stock at all times and it should be easy to find the right sequence and install the abrasives on your machine in very little time.

I have a radial arm machine. What should I use to restore a marble slab?

Radial arms machine are usually best fitted with Frankfurt abrasives especially when you need to repolish marble slabs. Tenax carries the complete line of tooling, from the metal diamond tools, to the fine grain diamonds, to the regular polishers. When dealing with polishing and repolishing we always recommend giving Tenax a call and speaking with one of our technicians who will guide you through the steps and the best combination for your particular stone and application.

Do Filiflex and Airflex brushes work on Marble?

Yes, both types work very well, but each will provide different textures then the carborundum filament brush. Airflex and Filiflex tend to smooth more the surface and leave a particular smooth, leathery finish. It is almost a warm feeling when you touch the surface and gentle enough that a glass can be left on the surface without the risk of tipping it over.

Can the Filiflex and Airflex be used on Automated machines?

Absolutely, Tenax makes several different attachments for many different machines and the Airflex and Filiflex come in more than one shape. We recommend to always use the Filiflex in the grit 36-46-60 and then use the Airflex to bring up the color and the shine if needed. As usual we recommend calling us to discuss different options and style of finish.

What is the maximum RPM the Filiflex and Airflex brushes can be run at?

As a rule of thumb, the slower the rpm the better the Airflex and Filiflex can work. Also is very important that minimal pressure is applied both to get a better life out of the abrasives as well as allowing the tools to dig deeper into the stone. For best results, 400-500 rpm is recommended.

How much pressure should I use with the Filiflex and Airflex brushes?

For the best results, light pressure is required, brushes need time running, not pressure. Also sine the Airflex and Filiflex have diamonds embedded they really just need to touch the surface to work. More pressure is just going to bend the bristles and shorten the life of the tool without any significant better result.

I want to create an antique finish on granite. What sequence should I use?

What you need to do is smooth the surface first to a 60 or 80 grit honed finish. In this way the brushes will find a uniform surface to work on and will have more grip.

Then we recommend using Filiflex 36-46-60. Followed by Airflex 120-220-300. This will create an antique finish. Tenax has also developed brushes that will go all the way to the 1200 grit and will bring the finish to what we call a”caress” finish. This finish is a high gloss antique effect. Call our technical department at 1-800-341-0432 to have more info on how to apply these principles to your reality.

Are the Brushes snail-lock and 5/8-11? Do I need the snail-lock backer?

Tenax has 4” Antique brushes that require a 4” snail lock adapter.  The 5” requires a 5” snail lock adapter.  The 4″ also has a 5/8-11 thread in the middle making it easier to use on hand held grinder/polishers.

Tenax has Diamond, Silicon Carbide, Filiflex, and Airflex Brushes. Which one should I use?

Although they all seem to do the same thing, diamond, silicon carbide, Filiflex, and Airflex brushes will give you a very different finish, depending on the sequence used and the combination of the types. Some are better on marble, others are perfect for engineered stone, while others are designed specifically for granite applications. We recommend calling Tenax to discuss your specific application and the brushes to use.



Why use fiberglass mesh?

Fiberglass mesh is used for different reasons. The main reason it’s used is to gain strength in fragile or thin slabs. When the mesh is applied on the back of the slab and is embedded with epoxy resin, it makes a slab much stronger when down force is pressed on the opposite side. Also fiberglass can be used in between 2 pieces of granite glued together, to prevent the accidental release of any broken pieces in case something will damage them.

What product is used to glue the mesh on slabs?

The recommended product for applying the fiberglass mesh is a flowing epoxy. TENAX has several different types to be very specific to the stone it’s being applied to.  KATTER system is a good option when faster applications are required. If a polyester resin was to be used, the fiberglass would eventually peel off.

Are there different types of mesh?

There are on the market a lot of different mesh and  composition. Tenax has mainly 2 different types of mesh, the standard 75 grams per square meter weight (1/4″ inch square type) mesh that’s used 99% of the time and a thicker 300 grams per square meter mat. The 75 grams comes in 4’ ,5′ and 6′ height rolls that are 100 meter long.  The thicker mesh comes in 4 and 5 ‘ height and 30 meters long (100 ‘). It is usually sold per linear meter.

Is it better to use fiberglass, carbon fiber, or steel for rodding my counter top?

This ultimately comes down to a matter of preference. All 3 types of rodding: white fiberglass, carbon fiber, or steel rods will greatly strengthen the counter top. Using any of these is better than using nothing at all. The question is: What are you looking for in a rod: Strength? Speed? Ease of use? Steel Rods were the original rodding material. Preparation is the biggest downfall to steel rods. The rods must be completely cleaned of oil, then use sandpaper to rough the surface to maximize adhesion, and also must use bolt cutters to be cut to the length required. Unfortunately if the stone will get moist or humid , the rod will eventually rust over time, giving way to liability issues in the long run.

White fiberglass as well as carbon fiber rodding has proven to be a faster, cleaner process. There is no need to clean or rough up the surface. Adhesive will bond to the rodding.  It can also be easier to cut.  Additionally, they are also extremely strong. Tenax has done exhaustive testing for the perfect combination of rodding and adhesive. Tenax used metal, fiberglass, and carbon fiber rodding using polyester and epoxy adhesives in a very controlled environment. With all 3 materials, polyester drastically increased the strength of the stone over using nothing at all. Using epoxy further strengthens the stone. The absolute best combination was using carbon fiber rodding along with Tenax Strong Edge Epoxy adhesive.


How do I remove a “green blossom” or California blossom”?

Certain paste poultices have been proven to remove this discoloration. There are now products available specific for the removal of these problems. See your distributor of supplies for solutions.

Before I apply Tefill to fill a scratch how do I hide the light color in the scratch?

You can use an Ager to darken the light appearance of the scratch or Ager along with Tepox V to color the scratch altogether. Look for the new Tepox V and Ager Pens for a good solution to this problem!

Does the CA activator have to be used with the Tefill kit?

The Adhesive will cure on its own but at a much slower rate. The activator is in fact an accelerator and speeds up the curing process tremendously.

I have heard CA activators can cause discoloration. Is this true?

In certain rare cases in some stones there is in fact a chemical reaction that can take place forming a discoloration of green or blue color. This has been called by different names, most commonly “California blossom” or “blue blossom”.  The cause really is not yet determined as to what truly causes the reaction. It cannot truly be blamed on activators or other chemicals at this time.

Should I use the Aerosol or pump spray accelerator when using the Tefill kit?

  It really is a matter of preference. The spray may allow for a finer mist and less waste.

Does Tenax have a product that can fill small pits on an installed countertop?

TEFILL is the ideal product for this application.

Tefill is CA or cyanoacrylate glue is a convenient package.

1 Gel glue

1 Liquid Glue

1 Activator

What product is needed to fill a scratch on my countertops?

TEFILL is the ideal product for this application. Tefill is CA or cyanoacrylate glue is a convenient package.

1 Gel glue

1 Liquid Glue

1 Activator

I have a chipped edge on my countertops, what do I need to fix it?

Glue it back with an epoxy Domo / RIVO / Epoxy Gel and then use Tefill to hide the crack…

TEFILL is the ideal product for this application.


I have etched my stone. How do I get it back to look polished?

There are 2 ways to work with a stone that has been etched. The first way is to mechanically repolish the stone using abrasives to repolish the surface to restore it back to its original polished look. The 2nd way would be to use a chemical to make the stone look repolished. Depending on the kind of stone, the color of the stone, the severity of the etch, Tenax can offer several different products to assist in getting a polished look back. Tenax has Ager, Pectro, Telux, Jet, Tewax. Please contact Tenax at 1-800-341-0432 or email info@tenaxusa.com to find out the best product for your specific need.


19 thoughts on “Q & A

  1. Is Tenax Hydrex a good sealer for honed Carrara marble kitchen counters? Will it change the appearance of the stone? Will it be a good stain protector? The place I am buying the marble from wants to use this product and the label says it is for polished surfaces so I’m concerned. Thanks!

    • Hydrex is a very good sealer that Tenax recommends for granite. In your particular application of honed carrara marble, we would recommend the Tenax PROSEAL, a super premium high grade sealer designed specifically for porous and honed stone, such as marble, travertine, limestone, etc. Proseal will not change the color of the marble. Click on the videos link of our blog and you will find videos on Proseal.

      • I saw a picture of a 1 liter can of Proseal. At the bottom of the can it states “polished granite”. Is this the product I should be using for my honed carerra marble.

      • You can most certainly use Proseal for your honed carrara marble. Proseal is a premium grade sealer that will penetrate deep into the honed marble. It will not change the color or hone of the stone. Proseal is really the perfect and best sealer for honed carrara marble

  2. i used tenax tewax on a polished concrete counter top. i buffed by hand with a clean rag and used a buffer. i can not seem to get the circular pattern of my application marks to go away. i buffed one top for appx. one hour with no results. what is the safest way to remove the tewax?

    • John,
      Try a 000 or 0000 steel wool to help cut those swirl marks off.
      Tewax is a very strong wax that really “bites” into the surface. It is difficult to get off, which is a good thing, for the homeowner.


  3. I would like to know what I could use to permanently glue stone to a pressed particle surface. I have a counter top surface of dense particle board with granite tiles on top. The tiles are adhered really well with basic thinset. The problem are the edge pieces. I have used thinset and tried construction adhesive, but they still pop off. Would you recommend using an epoxy for these pieces? If so what should I use? The edge pieces are black granite and thick, heavy pieces.

  4. I have to correct an error on my question. I have dense particle board topped with cement backer-board used in bathrooms under my granite tile counter top. The edge pieces won’t adhere, but the rest do. Please advise as to a product that will bond the granite edges.

    • It is very difficult to glue to particle board. More than likely you will always get failure from it. Please try try the Tenax Fixtop for working on the edges. It is an epoxy that will bond the strongest possible. No structural adhesive will be approved for particle board. The fixtop however will bond very strong to the cement board.

  5. Our company does not usually do any lamination, we have a shower base that we need to laminate a piece of soapstone to the soapstone base. What is your recommendation to use with soapstone, Epoxy Vs Polyester and name of your product.

  6. I purchased Lustrous Italuano products from you and Ager and Telux from another company.
    1. Can the Ager be used on on a Thassos marble window sill?
    2. And I’m curious is telux ever used on the top of polished counters? I ask only because after a couple applications of Ager on top if the granite counter I still see little dull spots along different spots if the granite.

    • 1) The Ager can be used on the Thassos marble window sill.
      2) Telux is not recommended for counter tops that are used frequently. The Telux is a topical varnish that will make the stone look polished. But in high traffic areas there is a possibility of it coming off. So, in general, we would not recommend it for counter top applications.

  7. I used Ager on my honed Virginia mist and love the look. Once I put two coats I then applied proseal due to the fact that this granite is very porous. I have a dark spot for some reason after the proseal. Can i reapply ager over the proseal to make the counter match the dark spot?

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