Comparison of Polymer Compounds in Use Today
The materials discussed in the following testing section are commercially available rubber compounds designed for high voltage insulators. The EPM compound is the original Ohio Brass compound. The EPM/Silicone alloy is the original Ohio Brass with silicone added. ESP is the current Ohio Brass compound which is an EPDM with silicone added.
Again, the other compounds listed are commercially available for any insulator manufacturer to purchase.