3M 6969 Heavy-Duty Duct Tape
Model NED-3763
Industrial strength for your most demanding jobs. Seals HVAC ducts, insulates pipes, makes tough, durable repairs. Holds strong on rough surfaces. Handles temperatures to 93°C (200°F). Polyethylene coated cloth filament backing. Aggressive high tack rubber adhesive. Meets UL 723 flammability, HUD and BOCA codes. 32 lb. tensile strength.