This Heng's Industries Butyl Roof Repair Tape is pliable, tacky and adheres to any type of metal, wood, concrete, glass, plastics and porous surfaces. Specifications•Used To: Seal And Bond Around Windows/ Doors/ Vents/ Joints To Rubber Roofs/ Metal/ Wood/ Concrete/ Glass/ Pl•Type: Butyl Tape•Length: 20 Feet•Width: 3/4 Inch•Color: Black Pliable, Tacky & Adheres To Any Type Of Metal, Wood, Concrete, Glass, Plastics & Porous Surfaces Excellent Sealant For Any Lap Joints Can Be Cut With A Utility Knife | MC Enterprises Heng's Industries Roof Repair Tape, 3/4" x 20', Black