High-performance, multipurpose thermoplastic elastomer based sealant for metal seams, metal roofing, siding, window frames, door frames, vinyl windows, Flashings etc on all types of roof membranes. Excellent adhesion to most surfaces including: metal, Kynar, asphalt, shingles, modified bitumen, EPDM, TPO, Elvaloy, PVC, Hypalon, vinyl, fiber cement, wood, concrete, tile, masonry, glass. #6600 is available in 14 colors including ultra-clear. It is also available in three grades: Standard caulking grade, Self-Leveling Grade (#6600SL) and Winter Grade (#6600W). Use to seal flashings and penetrations on all types of roofs or general leak repairs. Packaged in 10.1 oz. caulk tubes.