FKM
Fluoro rubber
FKM is a copolymer made of fluorinated hydrocarbons.
It is best known under the DuPont brand name Viton®.
FKM is very expensive compared to other elastomers.
As a result of its temperature resistance and resistance to mineral oils, fuels and acidic cleaning agents, however, it is used wherever NBR cannot be used due to excessive heat and chemical attacks.
It is best known under the DuPont brand name Viton®.
FKM is very expensive compared to other elastomers.
As a result of its temperature resistance and resistance to mineral oils, fuels and acidic cleaning agents, however, it is used wherever NBR cannot be used due to excessive heat and chemical attacks.
| Short designation | FKM |
| Brand name | Viton® |
| Chemical description | Fluoro rubber |
| Mechanical properties | |
| Hardness range [Shore A/D] | 60 – 90 |
| Wear resistance | Moderate |
| Tensile strength [MPa] | 10 – 17 |
| Physical properties | |
| Density [g/cm³] | 2 |
| Application temperatures | |
| Temperature range, short-term [°C] | -30 – 260 |
| Temperature range, continuous [°C] | -20 – 230 |
| Other properties | |
| Flammability according to UL 94 | V-2 |
| Chemical resistance | |
| Mineral grease and oils | ++ |
| Petrol | ++ |
| Weak/strong acids | ++/++ |
| Weak/strong alkalis | +/- |
| Perchloroethylene | + |
| Trichloroethylene | + |
| Acetone | -- |
| Alcohols | - |
| Brake fluid | -- |
| Hydrolysis resistance (hot water) | + |
| Weather/UV radiation | ++ |
++ very good / + good / o satisfactory / - moderate (significant change to properties) / -- unsuitable
This information is for reference only; we do not assume any liability for its accuracy. The properties of elastomer materials are highly dependent on their specific composition and their additives.