4500 roof bonding sealant is a premium Scypolymer 1-component, proprietary bonding sealant specifically designed for roofing applications and systems. Applies, adheres, and cures underwater. Quickly withstands ponding water while bonding to many common roofing substrates. Use for repairing and sealing around through-roof projections, termination points and flashings. 2 products in 1 - lap adhesive and scrim edge sealant. No additional primers, adhesives or sealants needed. Remains flexible. Works with EPDM membranes, tapes, and patches. Adheres to asphalt shingles, steel, concrete EPDM, primed TPO, primed PVC, metal, wood, and other common building substrates. Tack free: 90 minutes. Cure: 1 day. Black.