Sealer
"The sealer was easy to use and my clients were very happy with the satin finish it left on their vanity top. Very happy with this product and will continue to use it"
Z Aqua-Thane M35 is a water-borne, two-component, self cross linking polyurethane coating. It exhibits a satin finish and offers superior stain, abrasion and chemical resistance. The durability makes this sealer ideal for high-traffic areas. Z Aqua-Thane M35 is safe for indoor or outdoor use. 100% countertop safe.
Coverage - 50-75 sq. ft. @ 2 coats (one 1.25 qt. kit)
Aqua-Thane G40 vs. Aqua-Thane M35 - The G40 has a high gloss finish and will darken or "wet out" the concrete very similar to when water is applied to an unsealed surface. The M35 has a matte/ satin finish with very slight darkening on colored concrete.
Note: If a darkening effect with a satin finish is desired, one coat of the G40 can be used first to darken the concrete followed by 1-2 coats of the M35 to create the satin finish. They can also be used in reverse to create a gloss finish without any darkening. For this, start with at least 2 coats of the M35 (then test with water to make sure it is well sealed and no G40 will get through to the concrete), then apply 1 coat of the G40 to add a gloss layer.

How to Apply Z Aqua-Thane
Instructions
Surface Prep: New concrete must be completely cured before applying this sealer. Any moisture remaining in the concrete can cause adhesion issues. A minimum of 10 days after the concrete has been poured, you can check the concrete with either a concrete moisture meter or by taking several 18x18 inch sheets of clear plastic and thoroughly taping it to the surface completely around the edges. If after 24 hrs the plastic and concrete are dry, it is assumed there are not hydrostatic pressure problems. If acid stains or washes are used, the concrete must be completely neutralized back to a pH of 7. On all new hard troweled concrete a light sanding with 100-200 grit sand paper is recommended to open the surface and promote adhesion. On burnished, highly polished or concrete cast against smooth surfaces, additional sanding or acid etching may be required for the best adhesion properties. On textured or stamped concrete, no additional steps are required but in all cases concrete should be clean and 100% free of all dust, debris, or previous coatings.
Mixing: Mix exactly 4 parts of A to 1 part of B. Mix thoroughly with a paint mixing stick and always scrape the sides of your mixing container to ensure a uniform mixture. Mix adequately for 2-3 minutes. Failure to properly mix components may result in adhesion or hardness issues. Pot life of mixed components is roughly 45 minutes to 1 hour at 75ºF.
Application: Concrete surface should be between 55ºF and 85ºF. In smaller areas such as countertops, a 1/4” nap roller or a micro-fiber applicator pad is recommended. Product should be applied in a thin even coating. Do not allow to puddle in low areas. Back rolling may be necessary to control thickness and guarantee a uniform coating. Two coats should be applied for sufficient protection. On rough or more porous concrete additional coats may be needed. Always test with water to confirm concrete is adequately sealed. Recoat time is between 4-8 hours at 75ºF and the first coat should be tack free. If this window is missed, the first coat may have to be lightly sanded with 300 grit paper before applying a second coat.
**Avoid sticking tape to sealed concrete. Chemical bonds can form between glue and sealer which can be strong enough to pull off sealer and stain. If this happens, these areas can normally be sanded and spot fixed**
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Overall rating: 4.0617285 / 5 from 81 reviews.
Z Aqua-Thane M35 is a water-borne polyurethane coating that provides a satin finish, superior stain, abrasion, and chemical resistance. It is suitable for both indoor and outdoor use, offering durability for high-traffic areas. The product is easy to apply and dries quickly, with coverage of 50-75 sq. ft. per kit.
Review topics: ["look","finish","results","issues","work","countertops","sealer","sheen","spots","batches","shine","coat","application","project"].
"The sealer was easy to use and my clients were very happy with the satin finish it left on their vanity top. Very happy with this product and will continue to use it"
"This product is very easy to use! We built a plywood/Durock coffee table with a skim coat of Feather finish coating 2 years ago with another 1 part clear coat- didn't work. After re-doing the feather finish, we used the M35 2 part. Already this is so much better that the old surface. The color is much richer and appears sealed this time. Can't wait to see the results after time. . . Anyway, this couldn't be easier to apply. We used a roller which didn't initially look great, but smoothed out and now looks Awesome. Try this product!!!"
"Product worked great and no issue thus far :)"
"Your product is amazing, it was mirrored Image custom finishes first time using your product, simple to say the least, can't wait to use it again."
"The product deepens and enhances the look of finished concrete countertops and is pretty easy to apply. A small lint free cloth seems to give the best application"
"Used this to seal white concrete countertops from concrete countertop solutions. It is porous, and stains incredibly easily. anything with color, like any sort of food with colorful spice, tomatoe sauce, or now the bottom of a pan have all left stains, and in the bathroom some cough syrup spilled and also stained the countertop purple. Its permanent, cant get it out, as the color absorbs into the sealer. it also cracks off if any hot oil splatters out of the pan, and so after only one year of living in the space there are blemishes all over our countertops. I understand you have to treat things gently but its also a kitchen and things need to be able to spill and be wiped up without permanently staining a brand new white countertop. I am now faced with sanding off the entire kitchen and bathroom, which will probably spread toxic urethane dust all over my house, and resealing them all with something else. Desperately wish I had never used this sealer, cant warn you away strongly enough."
"Aqua-Thane M35 failed a few months after application on my outdoor concrete countertop. The Aqua-Thane bubbled up and failed to adhere to the concrete in several places. I emailed Concrete Countertop Solutions, and their solution said I should use SiAcryl 14 after stripping the Aqua-Thane. Really? Why do you advertise this product is for outdoor use?"
"Great product, my countertops look amazing!"
"This product was very easy to apply, but flakes of about as easily once dry. I have had my counters sealed for about 3 months and have to be extremely careful when setting any thing on them. I have numerous chips. I reached out to customer service but was told that I probably put the product on wrong."
"We noticed that the seal around the stove range gets affected by temperature. When cooking we typically have hot oil splashes and apparently the seal is not made for it, so we had to sand and re-seal and cover sealed areas with cutting boards."