To be your specialist in Insulation, Sealing& Protection solutions

Our main products including cold shrink tubing, heat shrink tubing, PTFE tubing, PVDF heat shrink tubing, high temperature heat shrink tube, identification sleeve, permanent cable maker, wire etc.


Braided Fiberglass Sleeve

Heat Shrink Tube

Cold Shrink Tubing


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Cold Shrink End Caps
  RUBLS-CAP Cold Shrink End Caps environmentally seal and mechanically protect exposed cable ends using no tools, mastics or tapes. They are close-ended, tubular EPDM rubber sleeves that are factory expanded and loaded onto a removable core. When positioned over the end of a cable, or other cylindrical object, the core is removed to provide a reliable seal that protects your cable ends from environmental damage. They are easily installed and cleanly removable. Whether in transit from the manufacturer, stored in the cable yard, or in process in a trench, your cable ends are protected from exposure to moisture, contamination and corrosion.. Four different end caps are available to accommodate a wide range of sizes.
*         Simple and fast installation, no tools required.  
*         Accommodates size ranges from 11.6mm –  
*         Good abrasion resistance.
*         Seals tight, retains resiliency and pressure even after prolonged years of ageing and exposure.
*         Water-resistant.
*         No mastic or tape required. 
*         No torches or heat required.
*         Resists fungus. 
*         Resists acids and alkalis. 
*         Resists ozone. 
*         Easily removed. 
*         No training required for installation.
The Volsun RUBLS-CAP End Caps protect cables, pipes and other cylindrical objects from exposure to moisture, contamination, corrosion, ozone, ultra-violet radiation, physical contact and other environmental hazards.
The Volsun RUBLS-CAP End caps install quickly and cleanly without flame or grease. Cold Shrink end caps are factory expanded on removable inner-supporting plastic cores. Once the end cap is positioned for installation around the end of a cable, the supporting core is unwound and removed. With the core removed, the live-memory action of the specially formulated material shrinks the end cap into position. The constant radial pressure of the Cold Shrink material ensures adorable environmental seal. The Cold Shrink material resists abrasion, fungus, acids or alkalis, and retains its resiliency for years. Freezing or overheating due to ambient temperatures encountered during shipping or storage does not impair the end caps.
Once installed, the Volsun RUBLS-CAP End Caps can be easily removed from the cable. Simply lift the edge of the end cap; slice the material with a utility knife and the end cap comes off cleanly, leaving no adhesive residue or grease.
Volsun RUBLS-CAP End Caps are stable under normal storage conditions. Normal storage and stock
Rotation is recommended.

Physical Property(Test Method)

Typical Value

US units (metrical)



300%Modulus(ASTM D 214-87)

480 psi(3.3 MPa)

Ultimate Tensile(ASTM D 412-87)

1400 psi(9.6 MPa)

Ultimate eLONGATION(ASTM D 412-87)


Die C Tear (ASTM G-21)

150 pli (26.3KN/m)

Moisture Absorption-7days in H2O

Wt.Gain 1.8%

Selection Chart

Product   Number

Use Range (mm)


11.6 – 20.9


15.9 – 30.1


26.0 – 49.2


45.5 – 84.3

Important Notice
  Technical information provided by Volsun is based on experience and/or tests believed to be reliable, but their accuracy is not guaranteed and the results may not be relevant to every user’s application. For this reason Volsun does not accept responsibility or liability, direct or consequential, arising from reliance upon any information provided and the user should determine the suitability of the products for their intended use. Nothing in this statement will be deemed to exclude or restrict Volsun’s liability for death or personal injury arising from its negligence. All questions of liability relating to Volsun products are governed by the seller’s terms of sale subject where applicable to the prevailing law. If any goods supplied or processed by or on behalf of Volsun prove on inspection to be defective in material or workmanship, Volsun will (at its option) replace the same or refund to the Buyer the price paid for the goods or services.  Except as set out above, all warranties and conditions, whether express or implied, statutory or otherwise are excluded to the fullest extent permissible at law.  Volsun is a trademark of the Volsun Company.
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