Hello Gene. Visit this page here to see a list of links under the sponsors section. They all sell commercial quality epoxy coatings and coating systems. The only Urethane 635 we are aware of is a joint filler by TremCo. Is this what you are referring to?

Hello Duane. We have an article here about tire marks. It discusses why they happen and how to try and remove them. The key is to clean those areas somewhat frequently to prevent them from happening in the first place.

My question is about permanent “brown spots” from tires on polyaspartic flaked coated floors. The flooring is gray/white/black flaked. I tried scrubbing them off to no success. It appears to be some sort of chemical reaction.

These floors look beautiful and have real promise to revitalize older pitted concrete floors but…

I used a national garage flooring company. Their local franchise professionally did the installation. After about 6-9 months I noticed “browning” under 3 of 4 tire locations of only 1 of my cars.

Luckily, the local contractor had to perform a “re-do” and now I am starting over. The contractor said this is an issue from only certain tire manufacturers. I was instructed the only thing to do is to put card board or vinyl mats under each tire. This does not seem to be a good solution for such an expense and beautiful garage floor.

Can you offer any suggestions or guidance?

Thanks.

Yes. It’s important to grind the area with a 25 grit diamond segmented disc or turbo cup wheel. 100% solids epoxy is thick and the type used is fairly fast curing. As a result, it’s important that the concrete surface is porous enough for the epoxy to penetrate the concrete so that it can adhere well. This is one reason why less viscous, lower solids epoxy primers are preferred (though not required) to apply to bare concrete before a 100% solids coating.

Thank you for responding. What is the best course of action to fix this without happening again. Patch the area and re clear coat the whole surface?