Key takeaways
- Peeling is usually a bonding or moisture problem
- Hot tires lift soft coatings
- Sunlight yellows many epoxies
- Remove failed coating before recoating
Peeling and bubbling
Peeling usually means the coating never really bonded. A slab that was smooth, dusty, oily or sealed does not give epoxy anything to grip. Bubbling is often moisture vapor pushing up from the slab or trapped air that was not rolled out properly.
Peeling under tires is usually hot tire pickup, where heat softens a weak coating and the tire pulls it up.
Yellowing and chalking
Many epoxies are not UV stable. Sunlight through garage doors and windows slowly turns clear and light-colored coatings yellow and dulls the surface. It is cosmetic at first, but it can be a sign the topcoat is breaking down.
A UV-stable polyaspartic or urethane topcoat resists this, and it can often be added over a sound old epoxy.
How to avoid and fix it
Prevention starts with diamond grinding, moisture testing and a system matched to the use. For existing floors, the fix begins with diagnosis: is the bond failing, is moisture the cause, or is it surface wear?
Failed coating should be removed, not painted over. After repairs, a new system with the right prep and topcoat can outlast the first one.
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Quick answers
Can peeling epoxy be repaired in patches?
Small, isolated spots can sometimes be patched, but widespread peeling usually means the whole floor should be stripped and redone.
Does yellow epoxy need to be removed?
Not always. If it is well bonded, it can often be scuffed and topped with a UV-stable coat.
Ready to talk it through? Get a free estimate or call 615-209-7643.