FKM 5 - Fluoroelastomer pentamer containing tetrafluoroethylene & fluorinated vinyl ether

Clwyd reference FKM 5
ASTM classification FKM 5
Typical applications
Advantages
Disadvantages
Available hardness range (Shore A) 60 - 95
Upper continuous service temp. 250°C
Min. temp. for sealing applications -10°C
Minimum non-brittle  temp.  -15°C
Tensile strength (up to) 20 MPa
Elongation at break (up to) 250%
Price Bracket High
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Excellent
Liquid 101 Excellent
Phosphate ester None
Ketone Average
Toluene Excellent
Iso-octane Excellent
Methanol Excellent
Acid (weak) Excellent
Acid (strong) Good
Base (weak) Excellent
Base (strong) Good
Hydrogen sulphide Good
Steam Excellent
Ozone Excellent
Radiation Excellent
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