FKM 5 - Fluoroelastomer pentamer containing tetrafluoroethylene & fluorinated vinyl ether

Clwyd referenceFKM 5
ASTM classificationFKM 5

Pentapolymer of tetrafluoroethylene (TFE), hexafluoropropylene (HFP), ethylene (E), a fluorinated vinyl ether (PMVE) and vinylidene fluoride (VF2/VDF). Type 5 FKM is known for base resistance and high temperature hydrogen sulfide resistance.

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 BracketHigh
ASTM 1 OilExcellent
ASTM 2 OilExcellent
ASTM 3 OilExcellent
KeroseneExcellent
Liquid BExcellent
Liquid 101Excellent
Phosphate esterNone
KetoneAverage
TolueneExcellent
Iso-octaneExcellent
MethanolExcellent
Acid (weak)Excellent
Acid (strong)Good
Base (weak)Excellent
Base (strong)Good
Hydrogen sulphideGood
SteamExcellent
OzoneExcellent
RadiationExcellent
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