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 15420 Dynafile III Abrasive Belt Tool
3M 87261, Scotch-Weld Epoxy Adhesive DP100, Clear, 400 mL Duo-Pak, 7000121318, 6/case
3M 35827, Hookit Dust Extraction Flexible Sanding Block, 273 mm x 67 mm, 7100256623
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 28217, Cubitron II Roloc Disc 984F, 60+ YF-weight, TR, 3 in, Die R300V, 7010326790
Standard Abrasives 704582, A/O Straight Cartridge Roll, 1/4 in x 1-1/2 in x 1/8 in 240, 7100080031
Insize QMS-A450-U, LARGE SIZE QUICK MEASUREMENT SYSTEMS,
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 20227, Scotch-Seal Metal Sealant 2084, Silver, 5 oz Tube, 7000046343, 36/Case
Dynabrade 14000 Dynafile Abrasive Belt Tool
NORTON 66254497068 - 3" Dia. Rapid Blend Vortex Disc, TR (TYPE III), Quick-Change Non-Woven, Medium, 25 Each
3M 13743, Scotch-Brite EXL Unitized Wheel, XL-UW, 2S Fine, 6 in x 1 in x 1 in, 7000028479
Norton 69936606277 - 4" X 5/8" - 11, Carbon Steel Narrow Face Stringer Bead .0200" Knot Wire Wheel Brush, 5 per box
3M 82594, Hot Melt Adhesive 3738 AE, Tan, 0.45 in x 12 in, 7100023046, 11 LBS/Case
Dynabrade 96558 Raptor Vac Cleaning Kit, w/ 6ft. Hose
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 
