Unlike conventional coatings, such as epoxies, where there is only a very narrow range of raw materials to select from, polyurethanes come in an extremely wide variety of shapes and forms. The term polyurethane coating is actually very generic because it covers everything from wood sealers to floor paint to underground tank coatings. The most common polyurethanes (such as aliphatic top coats, moisture cures and automotive paint) are solvent based systems. KEYWORDS for this process: 100% solids