Epoxy peeling is when a cured epoxy coating lifts off the concrete in sheets or patches because it lost its bond to the surface.
Understanding Epoxy Peeling
Peeling happens when the bond between the coating and the concrete fails. It often starts at doorways, along the garage door, or at cracks, then spreads in sheets. The coating usually comes off with a clean back, which points to an adhesion problem instead of a coating problem.
Common Causes
The most common cause is poor surface prep. Concrete that was not ground or shot blasted to the right profile will not hold a coating. Moisture vapor coming up through the slab is another big one, along with oil contamination, old sealers, and applying too thick or too late.
Hot Tire Pickup and Other Triggers
Hot tires can soften weak coatings and pull them up, especially on thin or low quality garage floor systems. Cold slabs, damp conditions, and skipped primers also raise the risk. Cheap kits often have thin films that wear fast.
How to Prevent It
Grind or shot blast to the right surface profile, test for moisture before you start, remove all contamination, and follow the mix ratio and recoat window on the data sheet. Use a primer made for the slab conditions and keep good records of your prep and testing.
Also Called
Epoxy delamination, epoxy lifting, floor coating peeling
