EPDM/Silicone Alloy
Recognizing the only beneficial characteristic of silicone rubber - hydrophobicity - but desiring a compound which had the excellent mechanical properties that EPDM can provide, Ohio Brass developed an alloy of EPDM and silicone which combines the best properties of these two materials. This compound is called ESP.
(*) Backbone refers to the C-C chain found in EPR materials and the Si-O found in silicone.