Geocel 4500 Roof Bonding Sealant is a premium Scypolymer one-component, proprietary bonding sealant specifically designed for roofing applications and systems. It applies, adheres, and cures underwater. The advanced technology of this bond sealant results in a product that quickly withstands ponding water while bonding to many common roofing substrates. This durable sealer is ideal for use on asphalt shingles, steel, concrete, EPDM, primed TPO, primed PVC, Hypalon (black only), metal, wood, and other common building substrates. No additional adhesives or sealants are needed when you use this flexible sealer. It has a non-flammable formulation and works with EPDM membranes, tapes, and patches. It can also be used as a night seal and for core/test cuts. Founded in 1974, the Geocel brand provides innovative, specially designed sealants. Quality is a key ingredient in every Geocel product and service offered, which is why professionals have come to trust and depend on Geocel products.