Our 4228 Red Insulating Varnish is a highly insulating coating with excellent arc and corona resistance. This low viscosity, one-part varnish coating is easy to use and adheres well to many substrates.

Applications & Usages

The 4228 insulates transformers, coils, armature, motor windings, and various electric generator parts against arc and corona. As well, it protects these parts from corrosion and moisture.  


  • High dielectric strength - 3 000 V/mil (dry); 1 500 V/mil (wet)
  • Insulation Class H - Suitable for service up to 180 °C
  • Excellent oil and moisture resistance
  • Excellent finish - tough, flexible, glossy, and durable red coat
  • Good water and salt water resistance
  • Good adhesion
  • High gloss 
Catalog Number Sizes Available Description
4228-55ML 55 mL (1.8 fl oz) Bottle
4228-225ML 225 mL (7.6 fl oz) Can
4228-1L 945 mL (1.99 pint) Can
4228-4L 3.78 L (1 gal) Can

Safety Data Sheet
Technical Data Sheet