In most cases, commercial epoxy floor coating installation takes just one day which includes diamond grinding and coating installation. If your concrete requires more extensive preparation, you have a large surface area, or you need certain specialty coatings, installation may take up to a few days. Once the epoxy is installed, it needs to cure completely before the floor can be used. Depending on the coating, your floor may need 1 to 5 days before you can walk, clean, and drive on the floor.