Heavy Duty Duct Tape
3939
Technical Data
March, 2013
Product Description
3M™ Heavy Duty Duct Tape 3939 is composed of waterproof polyethylene film over
cloth scrim backing with a rubber adhesive used for demanding duct tape applications.
Product Construction
Backing
Adhesive
Colors
Standard Roll Length
Standard Roll Width
Polyethylene
film over
cloth scrim
Rubber
Silver
60 yds. (54.8 m)
0.94, 1.89, 2.83, 3.78 in.
(24, 48, 72, 96 mm)
Typical Physical
Properties
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
ASTM Test Method
Adhesion to Steel:
58 oz./in. width (63 N/100 mm)
D-3330
Tensile Strength:
27 lbs./in. width (472 N/100 mm)
D-3759
Elongation at Break:
17%
D-3759
Thickness:
8.6 mils (0.22 mm)
D-3652
Temperature Use Range:
Up to 200°F (93°C)
Burn Test:*
Flame Spread Index
Smoke Developed Index
0
30
E-84
*ASTM E-84, UL-723, NFPA 255, and UBC 8-1 are publications of the same test method.
Features
• Offers easy tear and conformability.
• Low tack roll edges (48 mm) so edges stay cleaner for less surface contamination
and less waste.
• Individual roll wrap (48 mm) that preserves integrity of the roll for less waste.
• Product number printed in core to insure that correct product is used.
• Polyethylene coated cloth scrim that resists moisture to prolong tape bond.
• Good tensile strength for tough applications.
• Rubber adhesive that adheres aggressively to most surfaces for good holding
power and a tight seal.
3M™ Heavy Duty Duct Tape
3939
Application Ideas
• Hanging polyethylene drapes for containment activities, industrial masking and
sandblast overspray protection.
• Patching, reinforcing, bundling, moisture proofing, sealing, splicing, temporary
repair.
• Taping and splicing insulation.
• Useful in the convention industry for holding and seaming carpet padding,
taping down cords and hinging poster board panels.
Storage
Store under normal conditions of 60° to 80°F (16° to 27°C) and 40 to 60% R.H. in
the original carton.
Shelf Life
To obtain best performance, use this product within 12 months from date of
manufacture.
Technical Information
The technical information, recommendations and other statements contained in this document are
based upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such
information is not guaranteed.
Product Use
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use
and performance of a 3M product in a particular application. Given the variety of factors that can affect
the use and performance of a 3M product, user is solely responsible for evaluating the 3M product and
determining whether it is fit for a particular purpose and suitable for user’s method of application.
Warranty,
Limited Remedy,
and Disclaimer
Unless an additional warranty is specifically stated on the applicable 3M product packaging or product
literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time
3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY
OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OF TRADE.
If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s
option, replacement of the 3M product or refund of the purchase price.
Limitation of Liability
Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product,
whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted,
including warranty, contract, negligence or strict liability.
ISO 9001
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 standards.
Industrial Adhesives and Tapes Division
3M Center, Building 225-3S-06
St. Paul, MN 55144-1000
800-362-3550 • 877-369-2923 (Fax)
www.3M.com/industrial
Recycled Paper
40% pre-consumer
10% post-consumer
3M is a trademark of 3M Company.
Printed in U.S.A.
©3M 2013 70070951812 (3/13)
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