Silicones are known for their application along a wide range of temperature, the widest of the commercially available polymers. They are, however, susceptible to degradation by hydrocarbons and permeation of vapors. Fluorocarbons are high strength, low permeation materials with fairly good high temperature resistance, but limited low temperature application. Both elastomers are considered specialty polymers, and they are priced accordingly, the fluorocarbons being the most expensive. When looking at the similarities and differences of these two materials, the hope exists to gain the best of both at a lower price than the premium paid for fluorocarbon. The development of fluorosilicones is intended to do provide an approach to accomplish that goal.