20 ft Sections are cut from new master rolls. Seal any rip, tear, or open seam in any surface with RoofSeal. RoofSeal is the best solution for leak repair. It is the choice of professional roof repair specialists, on virtually all roof types including EPDM, TPO, hypalon, most PVC, modified, all metals, even copper and Kynar coated metals, tile, wood, concrete, etc. RoofSeal even works great on land-fill and pond liners. Our specialized backing has proven to be UV stable, even after 19 years in full sunlight. Our MicroSealant has a built in primer which allows RoofSeal to bond with the surface it is installed on. Perfect for re-seaming all roofs, regardless of the material. RoofSeal makes a permanent water-tight seal.