Features & Benefits

  • The ability to resist chemical decomposition in the presence of water, high humidity and temperature-superb hydrolytic stability
  • High dielectric strength
  • Resilient abrasion resistant surface
  • Excellent windability
  • Compatible with transformer oils and most varnishes
  • Heat shock 150°
  • Excellent resistance to mineral oils


Formvar is a single enamel system copper magnet wire designed for continuous operation at 105 degrees and is used in oil-filled transformers, coils, motors, as well as demanding cryogenic applications. It is one of the first magnet wire insulations based on the synthetic material polyvinyl acetal and phenolic resins.



CW Formvar is available in a single enamel system on copper conductors.

Any Questions?

Trina Perkins and Wendy Rampy are here to help.

[email protected]

Contact Form