Acrylonitrile Butadiene (NBR) 

Standard material  

Currently used for most applications  

Sealige codes M1, M6  

Low nitrile variant NL56/70  

For low temperatures (-45ºC)  

Fluorocarbon Tetrapolymer e.g. VitonB (FKM)  

Higher temperatures  

Fluid resistance  

Hydrogenated nitrile (HNBR)  

Wear resistance  

Ozone resistance