Rubber Flexx waterproofing and seam tape is an easy-to-use peel and stick repair material to seal and fix leaks and problem areas. Ideal for use on roofs, gutters, skylights, windows, doors, flashings, walls, foundations and many other surfaces. Seals immediately to stop water and air leaks. This repair tape sticks to metal, wood, fiberglass, plastic, glass, concrete, brick and rubber roofs. Rubber Flexx waterproofing and seam tape has incredible adhesion and forms a tough and durable repair.