3M Heat Shrink Tubing SMS Adhesive-Lined, 4:1, Semi-Rigid, Polyolefin for the Automotive Industry Data Sheet July 2019 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. 3M SMS tubing is resistant to sever vibration, certain temperature changes, and automotive fluids that are seen in the automotive and marine environments. Features All-Weather, Heat-Shrinkable, Dual Wall, Polyolefin Tubing for Automotive Wire Harnesses 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 For RoHS and REACH information, please visit www.3M.com/regs Applications Semi-rigid 3M 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 3M 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 -55C (-67 F) to 110C (230 F), with a minimum shrink temperature of 121C (250 F). Standard Sizes and Dimensions Minimum Maximum Nominal Meltable Ordering Color Expanded Recovered Recovered Recovered Size Code I.D. I.D. Melt Wall Outer Wall .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 1 of 3 3M Heat Shrink Tubing SMS Typical Properties Not for specifications. Values are typical, not to be considered minimum or maximum. Properties measured at room temperature 73F (23C) unless otherwise stated. Applicable Specification: ESB-M99D56-FORD, MS-DB56-CHRYSLER Typical Value Physical Property (Test Method) US units (metric) Black, and other color- Color coded sizes Tensile Strength 1900 PSI Ultimate Elongation (ASTM-D2671) 350% Longitudinal Change (ASTM-D2671) +0, -10% Secant Modulus (2%) (ASTM-D882 35,000 PSI Procedure A) Heat Aging 135C (Adhesive Softens) Specific Gravity (ASTM-D792) 1.25 (outer wall) Flammability (ASTM-D2671 Self Extinguishing Procedure B) Thermal Cycle 5C to 135C Vibration 24 hours Cold Flex -30C Typical Value Electrical Property (Test Method US units (metric) Dielectric Strength (ASTM-D149) 500 V/mil (outer wall) Dielectric Withstand 1000 Volts AC Current Leakage <0.250 Microamps Typical Value Chemical Property (Test Method) US units (metric) Auto fluid Compatibility 8 fluids 3M test methods available upon request. Handling and Read all Health Hazard, Precautionary, and First Aid statements found on the product label prior to handling or use. Safety Precautions 2 of 3