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.

Standard Abrasives 713638, Cartridge RoII Mandrel, 3/32 in x 3/4 in x 1/8 in x 1 in x 2-3/4 in CM-2B, 7010294964
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
Standard Abrasives 840038, Quick Change Surface Conditioning GP Disc, A/O Medium, TSM, Maroon, 3/4 in, QS75KM, 7000121647, 50/case
ACS CX1250 Diamond Belt, 1/2" X 24" 175u
3M 66192, Particulate Respirator 8214, N95, with Faceseal and Nuisance Level, Organic Vapor Relief, 7000002083, 80 EA/Case
Dynabrade 11642 Contact Wheel Ass'y, 4" Dia. x 5/8" W x 5/8" I.D., Scoop Face, 40 Duro Rubber
ACS Diamond Wheel, 1A1, 3" X 1" X 7/8", Straight 1/2", DD SD80 R75 B10-1/2
Dynabrade 32013 Dry Hat Filter (for model 61204)
Norton 66261013403 - 3" X 1/2" Extra Coarse Grade Silicon Carbide Bear-Tex Rapid Strip TR Stripping Disc, 10 Each
ACS Diamond Cloth Belt, CX1250 3" X 30" 125U
Dynabrade 59013 6" Dia. Self-Generated Vacuum Dynorbital-Spirit Random Orbital Sander, 3/8" Orbit
Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
Dynabrade 14000 Dynafile Abrasive Belt Tool
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 51346 3" (51 mm) Dia. Locking-Type Disc Pad, Medium Density, 1/4"-20 Thread
Dynabrade 51301 .5 hp Straight-Line Die Grinder
ACS 1/2 in x 24 in Diamond Metal Bond Belt, 120M/125u
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
3M 07189, Particulate Welding Respirator 8515/07189(AAD), N95, 7000002112, 80 EA/Case
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 53547 Extension Sub-Assembly, 1Hp Multi-Ext., Type A
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
Dynabrade 93245 8" Dia. x 1/2" Center Hole, 120 Grit, A/O, Arbor-Mount Sanding Star
Dynabrade 79521 1/2" W x 24" L Premium Medium Plus NWN DynaBrite Belt, 10/pack 
