Menu (ESC)

Perfluoroelastomer (FFKM)

FFKM is a thermoset elastomer or rubber material. It has the highest density and the lowest ductility among rubber materials. The graph bars on the material properties cards below compare FFKM to other rubber materials (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elongation at Break

170 %

Tensile Strength: Ultimate (UTS)

16 MPa 2.3 x 103 psi

Other Material Properties


2.0 g/cm3 120 lb/ft3

Maximum Temperature: Mechanical

280 °C 530 °F

Common Calculations

Strength to Weight: Axial

2.3 points

Strength to Weight: Bending

7.2 points

Followup Questions

Further Reading

Rubber Formulary, The, Peter A. Ciullo and Norman Hewitt, 1999