Fluoro Elastomer rubber or FKM is based on hexa-fluoropropylene vinyl-idene fluoride. The polymer has high resistance to heat with a temperature range of -40° C to + 250° C. It has also possesses a good flame resistance and is usually self-extinguishing. FKM's have excellent resistance to oxygen, ozone and natural weathering and also have outstanding resistance to compression, especially at elevated temperatures. Its resistance to most solvents and chemicals give long service life as it has excellent resistance against hydrocarbons, aliphatic, aromatic and chlorinated chemicals and resistance to acids and alkalis including oxidants. However, they have poor performance against ethers, ketones and bases.
FKM rubber sheeting has excellent resistance to chlorinated hydrocarbons, fuels and many acids. It is an alternative to genuine Viton rubber sheeting and can be cut into gaskets utilising in house CNC machinery.