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.

Norton 66254489957 Wheel, Vortex-7am, 6" X 1/2" X 1" C2312 Nor VTME7 PH VTC+, 4 Each
Dynabrade 31921 - 1" Static Conductive Hose, Black
Dynabrade 52102 .5 hp Straight-Line Die Grinder, Rear Exhaust, 4,500 RPM, 1/4" Collet
Dynabrade 79481 4" Dia. x 2" x 3/4" Arbor Hole, Dyna-Felt Polishing Flap Roll
Dynabrade 77757 4-1/2" Dia. x 7/8" Center Hole, 40 Grit, Z/A, Type 27, DynaCut Flap Disc W/Fiberglass, 10/pack
Dynabrade 78175 2" Dia., Coarse, NWN DynaBrite, TR Locking-Type Disc, 25/pack
Dynabrade M1005SP Mini Raptor Pro Pack
Dynabrade 93396 4" Dia. x 1/2" Center Hole, 220 Grit, A/O, Arbor-Mount Sanding Star, 10/pack
Dynabrade 48360 .4 hp Straight-Line Die Grinder, Rear Exhaust, 20,000 RPM, 1/4" Collet
Dynabrade 90354 3-1/2" W x 15-1/2" L 80 Grit A/O DynaCut Belt, 10/pack
Dynabrade 96597 Spanner Wrench Ass'y
Dynabrade 21485 ND3217, Upper Motor Bearing Plate
Dynabrade 80459 HEPA13 Filter
Dynabrade 78075 2" W x 34" L Coarse NWN DynaBrite Belt, 10/ Pack
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm
Thread Stretched, 7100135926 
