The elastomers which are generally used:
NR – natural rubber
SBR – styrene butadiene
EPDM – ethylene propylene
CR – chloroprene rubber
NBR – nitrile rubber
HNBR – hydrated nitrile rubber
IIR – butyl rubber
FKM – fluoro elastomer
VMQ – silicone (also LSR – liquid silicone rubber !)
FVMQ – fluoro silicone
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