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EV Cable Insulation and Connectors


Provide high-voltage insulation for electric-vehicle cables, wiring harnesses and connectors.

Design with confidence. Meet your needs for high-voltage insulation in hybrid- and electric-vehicle cables, wiring harnesses and connectors. Try Silastic® brand silicone elastomers and Dow Corning® brand silicone rubber to help you achieve system reliability and durability without special heat shields or added environmental protection.

Durable silicone rubber EV cable insulation and connectors

Maintain dielectric integrity with proven silicone elastomers
With Silastic and Dow Corning silicone rubber elastomers, you can meet performance specifications for high-strength insulation on charging cables, wiring harnesses and high-voltage connectors for hybrid and electric vehicles. These elastomers offer you:

  • Excellent dielectric properties to handle high system voltage and current
  • Reliable insulation strength over a wider temperature range than many organic elastomers can handle, from -40 to 200°C (-40 to 392°F)
  • Long-term flexibility without becoming brittle, checking or cracking due to age, exposure to ultraviolet (UV) rays or weathering
  • High resistance to tracking when exposed to moisture, salt spray, ozone and environmental contaminants
  • Durable resistance to abrasion and wear even when exposed to vibration, tight clearances, complex routing and repeated handling

Extend your options for high-performance hybrid- and electric-vehicle insulation
Meet requirements for cable and wiring harness insulation and high-voltage connector designs. Gain added productivity and performance with:

Get the innovative silicone elastomers and support you need for insulation on electric-vehicle charger cables and wiring harnesses.

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  • Get a product suggestion
    Let us suggest products to meet your EV cable, wiring harness and connector insulation needs.
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  • Request a customized material
    Get the material properties and performance you require.
Special Request
  • See additional automotive electrical and electronic solutions
    In addition to specialty sealants, elastomers and lubricants, we also offer more material options for other automotive electrical and electronic applications.

View more solutions for electrical and electronic applications

Connector seals and gaskets
Electrical system lubrication
Intermittent-fault protection
Other automotive electrical/electronic solutions

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Boots of electronic-grade silicone elastomeric encapsulant have been used to provide mechanical and electrical protection to battery packs in mainframe computers. The boots cushion vibrations and electrically isolate the batteries.

Learn more about the properties and performance advantages of silicone encapsulants and other specialty materials from Dow Corning.


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