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 69602, Cloth Belt 777F, 60 YF-weight, 1 in x 11 in, Sine-lok, Full-flex, 7010295223, 500 per case
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 65056, Scotch-Brite Blending Hand Pad 7446, HP-HP, SiC Medium, 6 in x 9 in, 7100082599, 40/Case
3M 18451, Scotch-Brite Heavy Duty Hand Pad 7440B, HP-HP, A/O Medium, 6 in x 9 in, 7000000715, 40 ea/Case
3M 01326, PSA Cloth Disc 348D, P240 X-weight, 3 in x NH, Die 300V, 7000045069
3M 35826, Hookit Dust Extraction Flexible Sanding Block, 178 mm x 67 mm, 7100256500
3M 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
Air Turbine Tools 310RSV - 6mm Router Hand Tool Series, 40,000RPM, 33441
3M 29859, Sanding Screen, 100 grit, 12 in x 18 in, 7100160861
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 53034, 663FC, 3/4" X 90", 20u, Diamond Trizact Belt 7100205969
3M 71346, 675L, 1" X 120", 125u, Diamond Microfinishing Film Belts, 7010534823
3M 22404, Roloc Disc 361F, 80 YF-weight, TR, 3 in, Die R300V, 7000045100
3M 34784, 663FC, 3" X 30", 20u, Trizact Diamond Belt, 7100063665
Dynabrade 95848 Dynabrade Gear Oil
Dynabrade 11395 Guide Wheel
ACS CX1250 Diamond Belt, 1/2" X 24" 9u
3M 41595, Polyurethane Sealant 540, Black, 310 mL Cartridge, 7100001804, 12/Case
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
Standard Abrasives 710870, Cartridge Roll Mandrel, 1/8 in x 1/2 in x 1/4 in x 1-1/4 in x 2-1/4 in CM-7, 7000121794
3M™ 94275, Versaflo™ Gold Coated Tinted Over-Visor with UV/IR Protection M-967N, 70071696879, 1 EA/Case
3M 09413, Scotch-Brite Contour Surface Paint and Varnish Remover 9413NA, 7000052005
3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box
3M 97421, Aluminum Foil Tape 3380, Silver, 72 mm x 45 m, 3.25 mil, 7010375681 
