... of HFP and VDF. Normally it is white or light yellow translucent elastomer whose fluorine content is over 66%. After vulcanizing process, FKM ... oils lubricants, etc. Mainly used to produce gaskets, O-rings, V-rings, sealing bowl with metal bone, diaphragms, tube, valve-plate ... poisonous HF and fluorocarbon organic .compound.2,Attention: FKM shouldn' t be calandered with metal powder (such as AI and Mg ...