EternaBond RoofSeal Black 4″ x50′ MicroSealant UV Stable RV Roof Seal Repair Tape | 35 mil Total Thickness – EB-RB040-50R – One-Step Durable, Waterproof and Airtight Sealant. bonds to a wide range of surfaces including roof materials such as EPDM, TPO, Hypalon, aluminum, galvanized steel, wood, and fiberglass.