FKM is a fluorocarbon elastomer with high thermal and chemical resistance. Its broad-spectrum resistance is relatively good. It is resistant to compression and is not easily deformed, even at high temperatures.

FKM is known especially for its low gas permeability and excellent ozone resistance, weather resistance and aging resistance.

PU materials display higher mechanical strength, high wear resistance, extrusion resistance, high-pressure load capacity, and high tear resistance and elongation. It also has good flexibility and very good aging and ozone resistance.

PU materials are applied to mineral oils and greases, hydraulic oils, silicone oils, greases, highly non-flammable hydraulic fluids HFA and HFB and water with the temperature up to 50°C.