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.

3M 85855, Cartridge Roll 747D, 80 X-weight, 5/8 in x 1-1/2 in x 3/16 in, 7010292565
3M 20903, PSA Cloth Disc 348D, P240 X-weight, 2 in x NH, Die 200P, 7000118877
Dynabrade 94991 1/4" Female Composite-Style Coupler with 1/4" Female Plug Assembly
3M 19765, Utility Cloth Sheet 314D, 9 in x 11 in P280 J-weight, 7000000353
Dynabrade 15420 Dynafile III Abrasive Belt Tool
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
3M 09548, Scotch-Brite EXL Deburring Wheel, XL-WL, 8S Fine, 6 in x 1/2 in x 1 in, 7000136514
3M 22409, Roloc Disc 361F, P120 XF-weight, TR, 1-1/2 in, Die R150S, 7000045103
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 26618, Accuspray Atomizing Head Refill Pack for 3M PPS Series 2.0,Clear, 1.8 mm, 7100141416 (4 Nozzles/Kit)
3M 15289, 663FC, 2-3/4" X 160", 40u, Diamond Trizact Belts 7010508900
3M 26016, PPS Series 2.0 Adapter, Type S9, 16 mm Male, 1.5 mm Thread, 7100135330 
