Industrial-strength duct tape owes its strength and reliable performance to its abrasion-resistant, water-proof polyethylene film backing. Its dense cloth scrim and aggressive rubber adhesive combine with the backing to produce an effective tape that conforms to surfaces, sticks where needed, seals, protects and meets dozens of other demanding application requirements. Going beyond strength and reliability, Extra-Heavy-Duty Duct Tape tears easily by hand and removes cleanly, for no-hassle use on demand. Valuable for hundreds of uses in transportation, aerospace, automotive, commercial vehicle, RV, bus, truck, ship yard, military, metal-working, furniture, electronics, solar, trailer-manufacturing and woodworking industries. A toolbox mainstay in industry and home workshops, 3M duct tape serves a wide range of maintenance, repair and construction needs. The term "duct tape" comes from the tape's original use in heating, ventilation and air conditioning (HVAC) applications, including duct sealing. Today it is found in residential, industrial and commercial environments and is used effectively in construction, electrical, industrial, marine, military, abatement, trucking and automotive areas. Grade: Heavy-Duty; Core Size: 3"; Dispenser Included: No; Adhesive Material: Natural Rubber.