ARLON® coil insulation materials are comprised of a variety of high-performance uncured and semi-cured silicones that provide superior electrical insulation and environmental protection. The material’s excellent dielectric strength, high thermal stability, and flexibility paired with durability make it an ideal solution for the most demanding rail/locomotive applications such as motor coils, generator coils, and other large rotating machinery.

Rogers offers a full range of ARLON® primary field coil insulation materials designed and certifiable to various OEM specifications at Caterpillar EMD®, General Electric (GE), General Motors (GM), National Electric Coil (NEC), and BHEL.

The materials are available in range of constructions, colors, sizes, roll lengths, and widths. They can also be customized to a customer's exact specifications.


  • Made of durable, long-lasting silicone rubber
  • High dielectric strength provides superior electrical insulation, even in the most challenging operating conditions
  • Functions for years with cold motor starts as low as -57°C and running up to 220°C
  • Compliant to EMS 558, EMS 2074, and various EMD, GE, GM, NEC, and BHEL specifications.
  • For use in a variety of coil shapes, sizes, and complex geometries
  • Flame resistant


  • Easy to install
  • Provides many years of flexibility
  • Resists damage from vibration, frame movement under load, and thermal expansion/contraction
  • Resists thermo-oxidative degradation, UV, ozone, arc-tracking, current leakage, and corona damage
  • Seals against moisture, carbon dust, dirt, and debris



Explore our calculators, conversion tools, technical papers and more.

  • ARLON® Product Properties Guide

    Generate ARLON® data sheets by filtering product information using various criteria, including property groups, product category or units, to find the best material for the application.


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