5 Tubes Black Lap Sealant Roofing Caulk. “More than 30 years of experience in single ply flat roofing products”. First Rate Materials – Black 45Mil EPDM Rubber & Latex Bonding Adhesive. · 3 Start at the bottom of the roof and roll out the EPDM from one side of the roof to the other and let it sit for 10-15 minutes.