For use on virtually all roofs, RoofSeal features a UV stable backing. With the exception of surface prep, RoofSeal is a one-step permanent repair system for virtually all roof types, and roof accessories. RoofSeal creates a waterproof, moisture, and air tight barrier with no additional sealing required. RoofSeal remains flexible to temperatures as low as -70 ° F, making it virtually impossible to thermally shock the seam causing a leak. RoofSeal bonds to a wide range of surfaces, including difficult roof materials such as EPDM, TPO, aged PVC, SBS, APP modifieds, asphalt BURs, coal tar BURs, all metal roofs, tiles, shingle, aluminum, galvanized steel, gypsum board, wood, polyethylene, propylene, polystyrene, fiberglass, brick, concrete, masonry, OSB, etc.