Why Epoxy Peels
Peeling epoxy is the most common complaint from homeowners who used a DIY kit or hired a cheap painter. Epoxy does not peel because the material itself is inherently bad; it peels because of how it was applied and what it was applied to.
No Mechanical Profile
Concrete is smooth. If you paint over a smooth surface, the paint simply sits on top. When subjected to the weight and heat of a vehicle, it rips off. Professional installers use diamond grinders to rough up the concrete (creating a profile) so the coating can sink in and grip the slab mechanically.
Contaminated Concrete
If there is oil, grease, silicone tire shine, or old concrete sealer in the pores of the slab, the new epoxy will bond to the contaminant instead of the concrete. When the contaminant lifts, the epoxy peels with it.
Hydrostatic Pressure
Moisture traveling up through the concrete from the soil below exerts massive pressure. If the epoxy applied is not formulated to handle this moisture vapor transmission, the water pressure will literally push the epoxy off the floor, resulting in large peeling blisters.