Custom Black FKM P-Section rubber tube
FKM is a family of fluoroelastomer materials defined by the ASTM International standard D1418. It is equivalent to FPM by ISO/DIN 1629 standard. All FKMs contain vinylidene fluoride as a monomer. Originally developed by DuPont (Viton®), FKMs are today also produced by Daikin Chemical (Dai-El), 3M's Dyneon (Dyneon Fluoroelastomers), Solvay Specialty Polymers (Tecnoflon), HaloPolymer (Elaftor) and several Chinese manufacturers. Viton® is now manufactured by Chemours. Fluoroelastomers are more expensive than neoprene or nitrile rubber elastomers. They provide additional heat and chemical resistance. FKMs can be divided into different classes on the basis of either their chemical composition, their fluorine content or their crosslinking mechanism.