Butyl Rubber

Butyl Rubber, IIR, is a synthetic rubber known for its outstanding impermeability to gases and excellent oxidation and ozone resistance. It is generally resistant to animal and vegetable fats, oils, greases, ozone, strong and oxidizing chemicals. It is generally attacked by petroleum solvents, coal tar solvents and aromatic hydrocarbons. It is the dominant choice for automotive inner tubes and tire liners. Other applications include belting, steam hose, o-rings,shock and vibration products.

Properties and Characteristics

  • Specific Gravity: .92
  • Tensile Strength, psi – Pure Gum: 1500
  • Tensile Strength, psi – Reinforced: 2500
  • Practical Shore A Hardness Range: 40–75
  • Resilience, Room Temperature: Poor
  • Resilience, Hot: Good
  • Tear Resistance: Good
  • Abrasion Resistance: Fair – Good
  • Atmosphere Aging Resistance: Good – Excellent
  • Oxidation Resistance: Good – Excellent
  • Heat Resistance: Good – Excellent
  • Low Temperature Flexability: Fair
  • Compression Set: Fair
  • Permeability: Excellent
  • Flame Resistance: Poor
  • Acid Resistance – Dilute: Excellent
  • Acid Resistance – Concentrated: Excellent
  • Moisture Resistance: Excellent
  • Solvent Resistance Hydrocarbons: Poor
  • Oxygenated Solvents: Excellent
  • Oil and Gasoline: Poor
  • Animal and Vegetable Oils: Excellent
  • Dielectric Properties: Good – Excellent

REDCO's Properties of Rubber Chart

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