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.
All-Weather, Heat-Shrinkable, Dual Wall, Polyolefin Tubing for Automotive
Wire Harnesses
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Semi-rigid polyolefin
Provides excellent strain relief
Functional over wide temperature range
Puncture resistant
Resistant to salt water, automotive fluids and corrosive chemicals
Fire retardant
Features
Applications
Semi-rigid SMS tubing is ideal for applications requiring 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 proportional
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
Standard Sizes
and Dimensions
Maximum
Expanded
I.D.
.220”
.300”
.350”
.450”
.700”
Maximum
Recovered
I.D.
.045”
.060”
.080”
.105”
.175”
Nominal
Recovered
Melt Wall
.030”
.033”
.038”
.043”
.060”
Meltable
Recovered
Outer Wall
.027”
.028”
.033”
.053”
.053”
Ordering
Size
.220
.300
.350
.450
.700
Color
Code
Yellow
White
Green
Red
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
Physical Property (Test Method)
Color
Tensile Strength
Ultimate Elongation
(ASTM-D2671)
Longitudinal Change
(ASTM-D2671)
Secant Modulus
(2%) (ASTM-D882
Procedure A)
Heat Aging
Specific Gravity
(ASTM-D792)
(outer wall)
Flammability
(ASTM-D2671
Procedure B)
Thermal Cycle
Vibration
Cold Flex
Typical Value
US units (metric)
Black, and other color-
coded sizes
1900 PSI
350%
+0, -10%
35,000 PSI
135ºC
(Adhesive Softens)
1.25
Self Extinguishing
5ºC to 135ºC
24 hours
-30ºC
Electrical Property (Test Method
Dielectric Strength
(ASTM-D149)
(outer wall)
Dielectric Withstand
Current Leakage
Typical Value
US units (metric)
500 V/mil
1000 Volts AC
<0.250 Microamps
Chemical Property (Test Method)
Auto fluid Compatibility
3M test methods available upon request.
Typical Value
US units (metric)
8 fluids
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3M™ Heat Shrink Tubing SMS
Handling and
Safety Precautions
Shelf Life & Storage
Read all Health Hazard, Precautionary, and First Aid statements found in the Material
Safety Data Sheet and/or product label prior to handling or use.
3M™ Heat Shrink Tubing SMS has a 2-year shelf life from date of manufacture when
stored in a humidity controlled storage (10°C/50°F to 27°C/80°F and <75% relative
humidity).
Standard Packaging
Cut pieces and 4 foot lengths. See price pages for standard lengths and carton
quantities. Other sized, lengths and packaging options are available, subject to
factory quotation.
Printing
Custom printing to identify resistors, diodes and other components is available,
subject to factory quotation.
Please contact your local distributor; available from 3M.com/electrical [Where to Buy]
or call 1-800-245-0329.
Availability
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.
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.
Warranty; Limited
Remedy; Limited
Liability
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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