3M™ Heat Shrink Tubing SMS
Adhesive-Lined, 4:1, Semi-Rigid, Polyolefin
for the Automotive Industry
Data Sheet May 2010
Description 3M™ Heat Shrink Tubing SMS is a co-extruded, dual wall product. It is a
composite of a polyolefin shrinkable outer wall and a thermoplastic adhesive inner
wall. SMS tubing does not degrade when exposed to automotive and marine
environments and is not affected by severe vibration, extreme temperature
changes, moisture or automotive fluids.
Features
All-Weather, Heat-Shrinkable, Dual Wall, Polyolefin Tubing for Automotive
Wire Harnesses
• Semi-rigid polyolefin
• Provides excellent strain relief
• Functional over wide temp erature range
• Puncture resistant
• Resistant to salt water, automotive fluids and corrosive chemicals
• Fire retardant
Applications Semi-rigid SMS tubing is ideal for appli cation s re quiring moisture sealing,
mechanical protection and strain relief.
The adhesive layer is compatible with typical wire insulation and is intended for
moisture sealing and insulation of automotive, RV, truck, trailer, tractor, heavy
equipment and marine wire splices, in-line components, fusible links and terminals.
Shrink Ratio SMS tubing has a 4:1 shrink ratio. When fully recovered, the tubing will shrink 25%
of its original diameter. The recovered wall thickness of the tubing is pro po rtio nal
to the degree of recovery.
The operating temperature range is -55ºC (-67 ºF) to 110ºC (230 ºF), with a
minimum shrink temperature of 121ºC (250 ºF).
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3M™ Heat Shrink Tubing SMS
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Standard Sizes
and Dimensions
Ordering
Size
Maximum
Expanded
I.D.
Maximum
Recovered
I.D.
Nominal
Recovered
Melt Wall
Meltable
Recovered
Outer Wall
Color
Code
.220 .220” .045” .030” .027” Yellow
.300 .300” .060” .033” .028” White
.350 .350” .080” .038” .033” Green
.450 .450” .105” .043” .053” Red
.700 .700” .175” .060” .053” Orange
Typical Properties
Not for specifications. Values are typical, not to be considered minimum or maximum.
Properties measured at room temperature 73°F (23°C) unless otherwise stated.
Applicable Specification: ESB-M99D56-FORD, MS-DB56-CHRYSLER
3M test methods available upon request.
Physical Property (Test Method) Typical Value
US units (metric)
Color Black, and other color-
coded sizes
Tensile Strength 1900 PSI
Ultimate Elongation (ASTM-D2671) 350%
Longitudinal Cha nge (ASTM-D2671) +0, -10%
Secant Modulus (2%) (ASTM-D882
Procedure A) 35,000 PSI
Heat Aging
135ºC
(Adhesive Softens)
Specific Gravity (ASTM-D792)
(outer wall) 1.25
Flammability (ASTM-D2671
Procedure B) Self Extinguishing
Thermal Cycle 5ºC to 135ºC
Vibration 24 hours
Cold Flex -30ºC
Electrical Property (Test Method Typical Value
US units (metric)
Dielectric Strength (ASTM-D149)
(outer wall) 500 V/mil
Dielectric Withstand 1000 Volts AC
Current Leaka ge <0.250 Microamps
Chemical Property (Test Method) Typical Value
US units (metric)
Auto fluid Compatibility 8 fluids
3M™ Heat Shrink Tubing SMS
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Handling and
Safety Precautions Read all Health Hazard, Precautionary, and First Aid statement s found in the Material
Safety Data Sheet and/or product label prior to handling or use.
Shelf Life & Storage 3M™ Heat Shrink Tubing SMS has a 2-year shelf life from date of manufacture when
stored in a humidity controlled storage (1 0°C/50°F to 2 7°C/80°F and <75% relative
humidity).
Availability Standard Packaging
Cut pieces and 4 foot lengths. See price page s for standard lengths and carton
quantities. Other sized, lengths and pa ckaging options are available, subject to
factory quotation.
Printing
Custom printing to identify resistors, diodes and oth er components is available,
subject to factory quotation.
Please contact your local distributor; av ailable from 3M.com/electrical [Where to Buy]
or call 1-800-245-0329.
Important Notice All statements, technical information, and recommendations related to 3M’s products are based on information
believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this product, you must
evaluate it and determine if it is suitable for your intended application. You assume all risks and liability associated
with such use. Any statements related to the product, which are not contained in 3M’s current publications, or any
contrary statements contained on your purchase order, shall have no force or effect unless expressly agreed upon,
in writing, by an authorized officer of 3M.
Warranty; Limited
Remedy; Limited
Liability
This product will be free from defects in material and manufacture at the time of purchase. 3M MAKES NO OTHER
WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above,
your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of
the 3M product. Except where prohibited by law, 3M will not be liable for any indirect, special, incidental or
consequential loss or damage arising from this 3M product, regardless of the legal theory asserted.
3M is a trademark of 3M Company.
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Electrical Markets Division
6801 River Place Blvd.
Austin, TX 78726-9000
800 676.8381
FAX: 800 828.9329
www.3M.com/electrical
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