502MS Karna-Flex is an elastomeric, thermoplastic-rubber sealant formulated for use on built-up asphalt roofs, modified bitumen membranes and properly prepared metal, concrete, EPDM, TPO, and most PVC membrane as well as spray polyurethane foam and plywood roof substrates. Its ease of application, superior adhesion, elasticity and durability make 502MS Karna-Flex an ideal repair sealant. Available in a brush mastic or caulking cartridge. COLORS: White, Black or Gray