Hard Top’s Coating, unlike many other commercials coatings, contains a chemical called methyl ethyl ketone or MEK. MEK is a very powerful chemical that can dissolve plastics – this is to our advantage. When we prepare the surface for countertop refinishing, we wet sand, increasing the surface area of your countertop by creating small grooves or scratches. The Coating seeps into the grooves after application, creating a mechanical bond. The MEK actually helps to melt into existing substrate.