Fluorosilicone

Typical Trade Name: Silastic L.S. - Dow Corning Corp.

Fluorosilicone combines the good high and low temperature properties of silicone with basic fuel and oil resistance. The primary uses of fluorosilicones are in fuel systems at temperatures up to 350 degrees F (177 degrees C), and in applications where the dry-heat resistance of silicone is required, but the seal may be exposed to petroleum oils and/or hydro-carbon fuels. In some fuels and oils, however, the high temperature limit is more conservative because temperatures approaching 350 degrees F may degrade the fluid, producing acids which attack fluorosilicone elastomers.

High strength type fluorosilicones are available. Certain of these exhibit much improved resistance to compression set.

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