1/9/2011
SILICONE (SI) Polysiloxane
Advantages: Outstanding resistance to high heat; excellent flexibility at low temperatures; low compression set; very good electrical insulation; excellent resistance to weather, ozone, sunlight and oxidation; superior color stability.
Limitations: Poor resistance to abrasion, tear, and cut growth; low tensile strength; inferior resistance to oil, gasoline, and solvents; poor resistance to alkalis and acids.
Comment: The most outstanding feature of silicone is its ability to retain rubbery properties through extremes in temperature. It is the most heat resisting elastomer in the market today and the most flexible at low temperatures. Service temperatures range from -150 to 500F. Silicone generally does not have high tensile strength, but much of the strength it does have can be retained at very high temperatures. Because silicone is relatively expensive, it is not normally used unless extreme temperature resistance is essential.
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