Founded in 1972, Polycast is a leader in the manufacture, research and development of epoxy-resin cast electrical insulating, transformer and switchgear components. Our strength lies within our people, innovation, commitment to quality and customer service. With our knowledge and experience as a foundation, we have evolved into the leading source of technically demanding quality castings that are in service around the world.

Indoor and outdoor insulators

Switch & Bus Insulators

Standard and custom indoor and outdoor insulator styles in various voltage classes


Transformer & Switchgear Bushings

Indoor and outdoor bushings in various styles and voltage classes with current ratings up to 5000 A



A wide array of indoor and outdoor low and medium voltage current transformers for control, metering and relaying applications


Custom &

Hundreds of custom and standard insulating and bushing product designs tailored to your specifications