SealSpec / Custom gaskets / FKM
FKM fluoroelastomer (Viton-type) gaskets
Custom-cut fkm fluoroelastomer (viton-type) gaskets (FKM): where it works, where it fails, typical properties, and how to call it out on a drawing. Use the builder to spec your part in this material.
Typical properties
| Polymer | FKM |
|---|---|
| Form | solid |
| Service temperature | -15 to 400 °F |
| Firmness | 60–90 Shore A |
| Common thicknesses (in) | .031, .062, .093, .125, .187 |
Typical ranges for the material family. Specific grades differ: confirm on the datasheet.
Strengths
- Excellent fuel, oil and chemical resistance
- High temperature capability
Watch out for
- High cost
- Poor in ketones, some amines and hot water/steam for standard grades
- Limited low-temperature flexibility for standard grades
Typical applications
- Fuel and chemical handling
- Semiconductor and process equipment
- High-heat engine seals
Specs and standards to reference
- ASTM D2000 HK callouts
- AMS-R-83248 grades (O-rings)
Chemical check: see Viton ratings across 2,088 fluids →