EPOXY
Epoxy flooring is highly durable, customizable, sustainable, and decorative for any surface. Epoxy flooring can withstand high levels of wear and tear, which makes it the most long-lasting flooring options. It is great for industrial use, garages, or any outdoor surfaces. There are also two different kinds of epoxy floor applications: epoxy flooring and epoxy floor coating. Confusion typically arises when comparing an epoxy floor and epoxy floor coating. The difference between them depends on the thickness of the epoxy; greater than 2mm thick is epoxy flooring and less than 2mm thick is epoxy floor coating.
Epoxy Flooring is where multiple layers of epoxy are applied to a floor, with a depth of at least 2 millimeters.
Epoxy Floor Coating is when epoxy is applied to an existing floor, with a depth of 2 millimeters or less.
-Info from EpoxyCentral.com