have excellent resistance to ozone, oxygen, have good mechanical properties and low compression set. Viton rubber Profiles is not suitable for contact with molecular weights ketones and esters (e.g methyl ethyl ketone). Due to its specialist properties Viton is much more expensive as compared to other elastomers. The terms FPM, FKM and Viton very often cause confusion and lead to incorrect interpretations. All of these designations actually stand for one single base material: fluoro rubber. Material Specification (Viton) Test Parameters Hardness 75 Shore 'A' DIN 53505 DIN 53479 7.5 N/mm DIN 53504 Elongation At Break 180% DIN 53504 Compression set 30% DIN 53517 Maximum Temperature +200C Minimum temperature -30C