Silicone Rubber

Silicone Rubber, SI, is a synthetic rubber that exhibits excellent high temperature operation and also very good low temperature flexibility. These are premium compounds that come at a premium cost and are very versatile for a wide range of applications. They are generally resistant to moderate or oxidizing chemicals, ozone and concentrated sodium hydroxide. They are generally attacked by many solvents, oils, concentrated acids and dilute sodium hydroxide. Applications are automotive, cooking, electronics and medical devices.

Properties and Characteristics

  • Specific Gravity: .95
  • Tensile Strength, psi – Pure Gum: 500
  • Tensile Strength, psi – Reinforced: 1200
  • Practical Shore A Hardness Range: 20–80
  • Resilience, Room Temperature: Good
  • Resilience, Hot: Fair
  • Tear Resistance: Fair – Good
  • Abrasion Resistance: Fair
  • Atmosphere Aging Resistance: Excellent
  • Oxidation Resistance: Excellent
  • Heat Resistance: Excellent
  • Low Temperature Flexability: Excellent
  • Compression Set: Good
  • Permeability: Good
  • Flame Resistance – Good
  • Acid Resistance – Dilute: Good
  • Acid Resistance – Concentrated: Poor
  • Moisture Resistance: Excellent
  • Solvent Resistance Hydrocarbons: Fair
  • Oxygenated Solvents: Good
  • Oil and Gasoline: Fair
  • Animal and Vegetable Oils: Good
  • Dielectric Properties: Excellent

REDCO's Properties of Rubber Chart

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