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