MATERIAL GUIDE
FFKM
Kalrez® / Chemraz®
We specialize in FFKM machining — custom CNC machining and molding of perfluoroelastomer (Kalrez®, Chemraz® and equivalent grades). FFKM delivers the highest temperature and chemical resistance of any elastomer, for the most demanding sealing applications.
Key Properties
Extreme chemical resistance
High temperature resistance (up to about 300°C / 570°F)
Excellent plasma resistance
Very low compression set
Long service life in harsh media
Typical Applications
Semiconductor process seals
Chemical processing seals
Oil & gas downhole seals
High-temperature O-rings
Aggressive media gaskets
Machining Capabilities
FFKM can be machined from rod and sheet stock for prototype and low-volume parts, or molded for production. Each part is inspected before shipping.
FAQ：
Q: What is the temperature range of FFKM?
A: FFKM grades typically operate continuously up to about 300°C (570°F), depending on the grade.
Q: Why choose FFKM over FKM?
A: FFKM resists chemicals and temperatures that would destroy FKM — worth the higher cost in critical applications.
Q: Is FFKM available in molded and machined forms?
A: Yes — both machined parts and molded seals are available.
For standard chemical seals, see our FKM machining page.FKMFKM
Browse our full range of machined engineering plastics and elastomers here.Materials