COTRAN ECap Cold Shrink Rubber EPDM End Cap

CSEC Cold shrink rubber end caps are usually used for environmentally seal and mechanically protect exposed cable ends using no tools, mastics or tapes. Cold shrink EPDM end caps are close-ended, tubular rubber tube 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, like moisture, contamination and corrosion etc.


  • Simple and fast installation, no tools required.
  • Accommodates size ranges from 11.6mm – 84.6mm.  
  • 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 acids and alkalis.
  • Resists ozone.
  • Easily removed.
  • No training required for installation

Technical Properties


Test Method

Typical Data


IEC 60529:1989

Pass, IPX7

Shore Hardness

ASTM D2240-15


Tensile Strength

ASTM D412-15a

≥8.5 MPa


ASTM D412-15a

≥ 650%

Tear Strength

ASTM D624-00(2012)

≥30 kN/m

Dielectric Strength

ASTM D149-09(2013)

22.4 kV/mm

Environmental protection

IEC 62321


UV resistance

ASTM D 4388


Ozone resistance

ASTM D 4388


Selection table



Cable Size(mm)




11.6 – 20.9

100 pcs/carton



15.9 – 30.1

100 pcs/carton



26.0 – 49.2

100 pcs/carton



45.5 – 84.3

100 pcs/carton


COTRAN ECap cold shrink 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.

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