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