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™ 53797, Flexible Diamond Belt 6451J, 1/2" Dia x 18" L, M125 Micron, Type G, Pattern B2, 7010509272
3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case
3M 20922, PSA Cloth Disc 348D, 60 X-weight, 1-1/2 in x NH, Die 150S, 7010326528.
3M 26578, Accuspray ONE Pro Spray Gun Kit for PPS Series 2.0, 7100158715
3M 49689, PSA Cloth Disc 348D, 60 X-weight, 10 in x NH, Die 1000C, 7010326501
Insize 7341-2S, PIN GAGE HANDLE (with 1pc handle and 8 pairs of collecting bushes), .075-.131", 6928640360695
3M 22393, Roloc Disc 361F, 36 YF-weight, TR, 3 in, Die R300V, 7000045093
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
ACS CX1250 Diamond Belt, 1/2" X 24" 175u
Air Turbine Tools 2545SVR - 6mm Angle Hand Tool Series (Long Version, Rear Exhaust), 40,000RPM, 35541
Dynabrade 51301 .5 hp Straight-Line Die Grinder
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 81376, Fibre Disc 381C, 50, 7 in x 7/8 in, Die 700BB, 7010326541
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919 
