IIR - Butyl rubber

Clwyd reference IIR
ASTM classification IIR
Typical applications
Advantages
Disadvantages
Available hardness range (Shore A) 35 - 85
Upper continuous service temp. 130°C
Min. temp. for sealing applications -50°C
Minimum non-brittle  temp.  -70°C
Tensile strength (up to) 18 MPa
Elongation at break (up to) >700%
Price Bracket Very low
ASTM 1 Oil None
ASTM 2 Oil None
ASTM 3 Oil None
Kerosene None
Liquid B None
Liquid 101 None
Phosphate ester Good
Ketone None
Toluene None
Iso-octane None
Methanol Excellent
Acid (weak) Good
Acid (strong) None
Base (weak) Excellent
Base (strong) Good
Hydrogen sulphide Excellent
Steam Good
Ozone Good
Radiation Good
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