Why Do Epoxy Floors Peel Bubble or Lift
With the first pass of the grinder done and the dust still hanging over the slab, the peeling that shows up a year later is already decided, and the cause is read the same way as at epoxy floor coating riverside evrnyc, from the concrete up. A garage floor in Riverside, CA, usually fails at the bond rather than in the coating itself, so the first look goes to the edge where the epoxy lifted and what is stuck to the underside of it.
Peeling
Most peeling traces back to poor surface prep. The slab was not ground, old sealer was left on, or oil was still in the concrete. Peeled film with a clean, shiny back never gripped. Film with concrete dust stuck to the back pulled the top of the slab with it, which points to a weak surface. Peeling is not always the product's fault, and it is not fixed by adding coats on top of a bad bond. Diamond grinding to an open profile is the step that decides it.
Hot tire pickup
Hot tires soften a thin or weak coating. As the tire cools it grips the film and pulls it off. This shows most after summer drives, and in the Inland Empire a garage can sit well above 100 degrees before the car even pulls in. Thin water based coatings and garage floor paints lift more readily than a thicker, well bonded system with a hard topcoat. Tire brand does not settle it. A polyaspartic or urethane topcoat over a full base coat resists it far better.
Blisters and delamination
Moisture vapor rising through the slab can build pressure under the coating. The result is blisters, or broad delamination where the film lets go in sheets. Slabs in Riverside County with no vapor barrier below are the usual suspects. Test the slab before the primer goes down, because no topcoat will hold back vapor that a primer was never chosen for.
Bubbles and pinholes
Bubbles and pinholes often come from outgassing. The concrete warms through the morning, air rises out of the pores, and it punches through the wet film. Rolling during the cool part of the day helps, and so does a thin primer coat that seals the pores first. On days when the Santa Ana winds are blowing, the surface skins over fast and traps what is rising. Mixing too fast whips in air as well, so the drill stays low and steady.
Soft spots and cloudy film
Soft or sticky spots usually mean the two parts were not mixed in the correct ratio or were not mixed long enough. The material has to be scraped back to hard film and recoated. A cloudy or greasy film on epoxy can be amine blush. It has to be washed off before another coat goes down, or the next layer sits on a slick surface and peels. Flake floors with vinyl flake broadcast into the base coat show it as a dull, waxy patch under the clear coat.