Lucas #6600UC Ultraclear™ Sealant is an optically clear. high-performance, multipurpose thermoplastic elastomer based sealant. Excellent adhesion to most surfaces including: metal, Kynar®, asphalt, shingles, modified bitumen, EPDM, TPO, Elvaloy/PVC, Hypalon, vinyl, fiber cement, wood, concrete, tile, masonry and glass. Use to seal seams, flashings and penetrations on all types of roofs. Ideal for residential roofing applications where appearance is important.