Silicone is a semi-organic elastomer with outstanding resistance to extremes of temperature with corresponding resistance to compression set and retention of flexibility. Silicone elastomers provide excellent resistance to ozone, oxygen, and moisture. Low physical strength and abrasion resistance combined with high friction properties limit silicone to static seal applications. Silicone utilizes a flexible siloxane backbone rather than a carbon backbone like many other elastomers and has very low glass transition temperatures.

Temperature Range

Low -59° C
High 232° C

Hardness Range

10 to 85 Shore A

Application Advantages

  • Excellent heat resistance
  • Excellent resistance to ozone, sunlight and oxidation
  • Excellent electrical resistivity
  • Excellent flame resistance
  • Excellent resistance to water, ammonia and alkalis (dilute and concentrated)
  • Good compression set resistance
  • Good resistance to dilute acids
  • OK in steam, alcohol, concentrated acid, ketones and oxygenated solvents

Application Limitations

  • Poor mechanical properties rating
  • Low tensile strength
  • Poor resistance to aliphatic hydrocarbons
  • Poor resistance to oil and gasoline
  • Not recommended for degreasers and solvents, especially chlorinated solvents like methyl chloride


  • High Temperature Seals, food grade application seals, Medical applications.