Floor Coatings Questions

I used some of the 2-part epoxy from Rustoleum with a coat of their 2-part epoxy clear (with anti-slip grit) on garage floor when I moved into my house in 2009. The parts near the garage doors that see sun have yellowed a little, but the rest looks good as new when it's clean. It does make wiping up spills a breeze and I'd do it again in a heart beat.