APOC® 337 Elastomeric Asphalt Emulsion is a rubberized roof coating which can be applied over virtually any type of roof surface. This professional grade, watertight coating forms a seamless barrier that will withstand water. Its elastomeric properties and superior bonding ability produce an outstanding base coat of protection for almost any roof condition. APOC® 337 actually expands and contracts with the roof’s surface to resist peeling, cracking and checking. It can be applied to modiied bitumen, built up rooing, asphalt, shingles, metal, concrete and even old tar roofs. Roofs coated with APOC® 337 form an excellent base for all APOC relective roof coatings. DO NOT ALLOW PRODUCT TO FREEZE.