The Geocel GeoGreen 4500 Roof Bonding Sealant is a premium Scypolymer one-component, proprietary, non-solvent bonding sealant specifically designed for roofing applications and systems. The advanced technology of 4500 Roof Sealant results in a product that immediately withstands ponding water while bonding to many common roofing substrates. This sealant by Geocel will adhere to asphalt shingles, steel, concrete, EPDM, primed TPO, primed PVC, Hypalon (black only), metal, wood, and other common building substrates. GeoGreen 4500 can also be used as a night seal and for core/test cuts. Meets LEED & NAHB guidelines. Safe, non-flammable, non-solvent formulation. Do not use on unprimed TPO or PVC membranes. Do not use black 4500 Roof Sealant on white EPDM. Do not use white 4500 Roof Sealant on black EPDM.