A Tape with Versatility
Originally developed for heating, ventilation and air conditioning (HVAC) applications, duct tape is used today in a variety of maintenance, repair and construction settings. 3M™ Heavy Duty Duct Tape 3939 is an excellent choice for general indoor application in MRO and construction. The tape was tested for flame spread using test method UL723, ASTM E84 and can be used at temperatures as high as 200°F for up to 30 minutes. The sturdy cloth-reinforced tape can be torn from the roll by hand and sticks instantly, providing a wide range of convenient solutions. This tape has a classic silver-colored backing.
Recommended Applications
- Patching
- Bundling
- Reinforcing
- Tabbing
- Taping / splicing insulation
- Capping pipe
- Securing conduit ends
- Marking
- Labeling
- Temporary repair
- Hanging poly (polyethylene drapes)
- Protecting against light sandblast overspray
Built to Stick
3M’s family of rugged cloth and duct tapes adheres to most surfaces for applications ranging from bundling to moisture proofing, sealing to splicing, reinforcing to hanging poly drapes. Available in a variety of colors and strengths, they’re known best for their hand tearability, high tensile strength and conformability.

Dynabrade 11684 Dynabelter Contact Arm Assembly 4" DIA X 5/8" W., 40 Duro Serrated
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 14000 Dynafile Abrasive Belt Tool
Norton 66623399137 - 4 1/2" X 5/8"-11, BlueFire 40 Grit Type 27 Flat Flap Disc, 10 per box
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Dynabrade 90083 8" Dia. Cutting Pad Assembly
Norton 66253370801 - 9" X 1/4" X 5/8"-11 Quantum3 Ceramic Type 27 Depressed Center Grinding Wheel, 10 Each
Norton 66261014792 - 2" Medium Grade Aluminum Oxide Bear-Tex Speed-Lok High Strength Maroon TR Non-Woven Abrasive Disc 160 Each
Norton 66254441401 - 6" X 1/2" X 1", Vortex Wheel, U2305, 4 Each
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Norton 66261096557 - 3" X 1/2" Blaze Rapid Strip Ceramic Alumina Extra Coarse Grade Non- Woven Abrasive Disc With Quick Change TR III Attachment, 25 Each
Norton 66254489931, Flap Disc, 4-1/2" X 7/8" Arbor Hole Full Diamond KGS Hybrid 60 Grit, 1 Each
3M 14725, Foam and Fabric Spray Adhesive 24, Orange, 16 fl oz Can (Net Wt 13.8 oz), 7100179450, 12/Case 
