USE AS A GASKET: DoubleStick is sticky on both sides and is perfect for use as a gasket when installing windows and vents on RVs, mobile homes, steel buildings, etc. TWIST INTO A ROPE: DoubleStick works when folded into a bead, as moldable sealant to fill gaps or holes, as gasket around wall penetrations, and on RV under belly to keep debris out SEALS SEAMS: Perfect for roofing membranes seam repair and seal, and bonds to many surfaces including EPDM, TPO, Hypalon, aluminum, galvanized steel, gypsum board, wood, many plastics, fiberglass, brick, concrete, and masonry CONVENIENT SELF SEALING: DoubleStick tape is a self-sealing sealant tape used to create a permanent, weather proof, conformable seal between two or more surfaces EASY TO USE: Simple and quick three-step instruction, using sticky tape with no trays or messy solvents to clean up after the project completion, and no other adhesive needed