FFKM O-Rings &Seals

Request A Quote

Rocket Seals distributes perfluoroelastomer O-rings and seals made from a variety of FFKM materials. Perfluoroelastomer (FFKM) O-rings and seals have the highest temperature tolerance and chemical resistance of any O-ring or seal.

At Rocket Seals, we are committed to offering superior customer service. We see ourselves as your partner, providing technical expertise in selecting FFKM O-rings and seals that meet your specifications and are appropriate for your applications. We stock a large inventory of perfluoroelastomer (FFKM) O-rings and perfluoroelastomer (FFKM) seals from leading manufacturers.

Benefits & Characteristics of FFKM O-rings and Seals

Perfluoroelastomer (FFKM) is a synthetic rubber with higher amounts of fluorine than the standard FKM. This higher fluorine concentration gives FFKM the great high temperature and chemical resistance you need.

In fact, FFKM has a high temperature rating of up to 620° F and nearly universal chemical compatibility including highly corrosive fluids and hydrocarbons. Additionally, FFKM withstands environments where oxygen-plasma are present for many hours and has a generally long service life. This combination of high-performance capabilities makes FFKM seals and O-rings the best choice for challenging applications.

We offer FFKM O-rings and seals in Simriz®, Kalrez® and Chemraz®.


Kalrez® is a DuPont trademark. It is resistant to over 1,800 different harsh chemicals while offering the high temperature stability of Teflon™. Temperature range for these compounds is usually -4°F to 615°F.


Chemraz® is the Green Tweed version of Kalrez®. It is also a member of the perfluoroelastomer polymer family Simriz®. Chemraz® can handle high heat and is chemical and solvent resistance. Its defining properties are exceptional resistance to steam and performance in low-temperature environments, as well as availability.


Simriz® is typically a lower cost alternative to both Kalrez® and Chemraz®. This compound does well in aggressive environments like dry process chemistries and reactive plasmas. Simriz® has excellent heat resistance, great low temperature performance and amine resistance.

FFKM O-Ring & Seal Specs

Rocket Seals distributes FFKM O-rings and seals manufactured in standard inch and metric sizes as well as custom configurations.

These components are best used in critical applications where seal failure is not an allowable possibility.


  • Aerospace
  • Energy
  • Pharmaceutical
  • Industrial
  • Oil and Gas Recovery
  • Semi-Conductor Fabrication
  • Chemical processing
  • Extreme applications

O-Ring Specs & Certifications

  • AS568 (2-XXX, 3-XXX, 5XXX Sizes)
  • FDA and USP Class VI
  • Mil, AMS and NAS Spec
  • NSF 51, NSF 61 and UL Listed


Get A Quote


If you have any questions, please fill out the form below and a Rocket Seals technical expert will get in touch with you shortly.

Yes, sign me up.

Need O-Rings or Other Seals Fast?


Rocket Seals is the leading distributor for O-Rings and many other seals.

Request a quote and have it shipped the same day!

Request A Quote