Electrical Insulating Materials

Electrical Insulating Materials

Online Plastics® stocks inventory of electrical insulating materials, including grades of GPO, phenolics, and MarBal / Glastic standoff insulators. We stock materials from Rochling and many other manufacturers and maintain inventory across the US for fast shipping to you. Our electrical insulating materials can be found in dry transformer, motor applications and more. Electrical insulating materials maintain electrical and mechanical characteristics in high temperatures.


  • NEMA Grade Li 1-999 available

  • NEMA Grade GPO

  • UL approved materials in stock

Shop from our Electrical Insulating Materials

Contact us

We invite you to shop our selection of materials and to call us toll-free with any questions at 877-246-7700. We are open Monday - Friday from 8:00 AM to 5:00 PM EST. You may skip add to cart steps and complete the request a quote form directly!