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Our Raychem WCSM Thick-Wall Heat Shrink Tubing has high electrical characteristics and mechanical strength for low voltage applications
thick-wall heat shrink tubing

Our Raychem WCSM Thick-Wall Heat Shrink Tubing is made of heat shrink polymer, which is halogen-free and stabilized against UV irradiation. It is field-proven for long-term reliability in harsh climatic conditions and polluted environments, and has a decades-long shelf life when stored under normal conditions. 

During heating, the thick-wall tubing shrinks to the original smaller extruded diameter, fitting tightly over a wide range of cable sizes and cable accessories because of its high shrink ratio. At the same time, the tubing’s inner sealant wall gives a reliable moisture seal over even extremely irregular shapes. The mechanical strength of our Raychem Thick-Wall Heat Shrink Tubing enables immediate back-filling of cable trenches after jointing. This tubing offers the electrical and physical properties of cable over sheath and the core insulation of low voltage cables combined with ruggedness and ease of installation. It can be used to seal against moisture of cable splices and for mechanical protection of outer rejacketing in low, medium and high voltage applications.


Key Features

  • Thick-wall, cross-linked polyolefin, stabilized against UV irradiation and weathering
  • Halogen and silicone-free material, noncorrosive, non-toxic, free of lead and aluminium
  • Available inline coated with hot melt adhesive
  • Compliant to RoHS and REACH regulations
  • Approved for offshore applications
  • Color black, >3:1 shrink ratio
  • Decades-long shelf life under normal storage conditions


Frequently Asked Questions

Question: With what type of cable can I use the TE’s Raychem WCSM Thick-Wall Heat Shrink Tubing?

Answer: Our Raychem Thick-Wall Heat Shrink Tubing can be used with low, medium, and high voltage electrical joints and splices and terminations of a wide range of cable size diameter. This is thanks to a high shrink ratio.


Question: What is Thick-Wall Heat Shrink Tubing made of?

Answer: Our WCSM uses highly specialized heat shrink materials engineering. It is a cross-linked, thick-wall polyolefin, that will shrink to the original smaller extruded diameter when heat is applied. 

The heat shrink material is comprised of polymeric materials exposed to a high-energy electron beam that causes permanent cross-linking, or intermolecular joining, of adjacent molecules. Due to cross-linking, the heat shrink material loses its melting properties allowing it to be heated to temperatures beyond the crystalline melting point without melting. Above this temperature, heat shrink tubing can be expanded and formed in shapes that will remain in position while the temperature decreases below the crystalline melting point again.

When properly installed, TE’s Raychem heat-shrinkable tubes are long-lasting products that will help you improve your grid connectivity and reliability for decades.


Question: Which voltage range does the Thick-Wall Heat Shrink Tubing cover?

Answer: This is suitable for insulation in low voltage cable accessories up to 1 kV, or for sealing and rejacketing on low, medium and high voltage cable accessories.


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Material System  Crosslinked Polyolefin

  • Power Cable Tube & Accessory Technology  Heat Shrink

  • Power Cable Tube & Accessory Product Type  Heat Shrink Tubing

  • Adhesive Coating  No, Yes

  • Power Cable Tube & Accessory Shrink Ratio  > 3:1

  • Wall Style (Excluding Adhesive)  Single

  • Component Design  Heat Shrink

  • Coating Style  Inline

Body Features

  • Flexibility  Semi-Rigid

  • Color  Black


  • Application Diameter (Max) (mm) 10, 14, 22, 31, 44, 50, 63, 81, 100, 118, 144, 162, 180, 225, 295, 350

  • Application Diameter (Max) (in) .393, 3.937, 4.645

  • Application Diameter (Min) (mm) 3.5, 4.5, 6.5, 9, 13, 17.5, 18, 22, 28, 33, 38, 55, 72, 105, 125

  • Application Diameter (Min) (in) .137, 1.299, 1.496

  • Power Cable Tube & Accessory Expanded Inside Diameter (Min) (mm) 12, 16, 24, 34, 48, 56, 70, 90, 110, 130, 160, 180, 200, 250, 280, 320, 385

  • Power Cable Tube & Accessory Recovered Inside Diameter (Max) (mm) 3, 4, 6, 8, 12, 16, 20, 25, 30, 35, 50, 65, 70, 95, 110

  • Power Cable Tube & Accessory Cut Length (mm) 60, 75, 80, 100, 125, 150, 170, 175, 200, 220, 225, 230, 250, 280, 300, 350, 400, 440, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 1000, 1100, 1200, 1250, 1300, 1350, 1400, 1500, 1550, 2000

  • Recovered Wall Thickness (Max) (mm) 2, 2.4, 2.7, 4, 4.3, 4.4, 4.5

  • Wall Thickness  Thick, Thick/Heavy

Usage Conditions

  • Power Cable Tube & Accessory Flammability  Non-Flame-Retardant

  • Environmental Resistance  Moisture, Weathering, Rain, Salt Water, Contaminated Water …, Transformer Oil & Hydrocarbons

  • Chemical Resistance  Yes


  • UV-Stabilized  Yes

  • Mechanical Resistance  Abrasion Resistant, Against Mechanical Impact or Damage

  • Non-Toxic & Non-Corrosive Emission  Yes

  • Low Smoke Emission  Yes

  • Marine-Offshore-Shipbuilding Certified  Yes

  • Thermal Resistance  Applicable for Low Temperatures, Applicable for Low Temperatures, Applicable for High Temperatures, Flame-Retardant

  • Emission Free  No

  • Free of Lead, Cadmium, Heavy Metals  Yes

Industry Standards

  • Standards  IEC 60684-3-214, IEC 60684-3-246, IEC 60684-3-247, HD631.2

  • UL Rating  Yes

  • CSA Certified  Yes

Product Availability

  • Power Cable Tube & Accessory Product Availability  AMERICAS, ANZPAC, ASIA, China, EMEA

Packaging Features

  • Spool Length (m) 100, 150, 250, 300, 350, 80


  • Product Use  Insulate, protect & seal power cable joints

  • Other Colors Available  No

Reference Number

  • TE Internal Number CAT-WCSM

Related Materials

Datasheets & Catalog Pages