Concrete surface must be properly prepared prior to epoxy flooring installation to ensure proper adherence of the epoxy product to the concrete surface. Cracks and damages need to be repaired. Oil and gas stains need to be removed.
Mechanical preparation either through diamond grinding or shot blasting is done to open the pores of concrete and get rid of all irregularities. This is to ensure that once the epoxy material is applied it will properly bond with the concrete surface.
If surface prep isn’t done properly then the epoxy will bubble and look bad. It’s important that the integrity of the concrete be perfect prior to laying down any floor coatings.