Delivering Fluid Sealing Solutions Since 1972

Perfluoroelastomer O Rings (FFKM)

Perfluoroelastomer FFKM O Rings Supplier UK With International Delivery

The UK’s largest independent Perfluoroelastomer / FFKM O Rings provider – available from stock. Our O Rings offer outstanding performance in demanding operating environments. The chemical and heat resistance of Perfluoroelastomer (FFKM) are similar to those of PTFE. It combines the positive properties of a PTFE O Ring with the elastic behaviour of FKM / Viton O Ring. Perfluoroelastomer / FFKM O Rings are only used if other materials cannot meet the very high application specifications.

FFKM Chemical Resistance

Typical applications for Perfluoroelastomer O Rings include the Chemical, Aerospace, Oil and Gas, High Vacuum Technology and Semi-conductor industries.

What sets M Barnwell Services Perfluoroelastomer O Rings apart?

  • Manufacturing lead-times are the shortest in the industry
  • Technical support and advice
  • Material testing and analysis
  • Material innovations such as the range of unique Perfluoroelastomers provide the low-temperature capability of any FFKM down to -46°C (-51°F)
  • International Delivery
  • 72 Hour delivery on British Standard BS1806 FFKM range (Temperature -25°C, +270°C)

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FFKM’s are available in Perlast®, Simriz™, Elast-O-Lion®, Parofluor®, Kalrez®, Chemraz®, Isolast®, Ekraz®, Kaflon™ and Valqua (Armor, Fluoritz). Technical data sheets will accompany your sealing product and for a detailed list on genuine manufacturer grades and compounds click here.

OEM’s, end users and resellers can all count on M Barnwell Services for short lead times and guidance on selection for their specific sealing application. Our experienced team will guide all aspects of production, including prototyping, testing, and final part manufacture. The long-term, proven performance of FFKM parts can mitigate against seal changes, repairs and inspections. The material will also increase process and equipment uptime for greater productivity and yield. M Barnwell Services can also offer a full range of alternative grades with UK manufacturing options.

For further material details about our range of materials visit our Material Properties page or the O Rings Homepage.

If you would like more information about our range of Perfluoroelastomer O Rings (FFKM), download our catalogue, or contact a member of the team.


Perfluoroelastomer O-Ring sizes available from micro miniature.

We have a selection of Perfluoroelastomer O-Ring in stock at our branches in Birmingham,Scotland, Dartford, Bristol and Manchester. However (depending on conditions)if we do not have your item in stock there is a short lead time in supplying your request. Contact the team for today for more information.


FFKM’s are available in Perlast®, Simriz™, Elast-O-Lion®, Parofluor®, Kalrez®, Kaflon™, Chemraz®, Isolast® and Valqua (Armor, Fluoritz).

Temperature Range

between -50°C and +327°C (intermittent/compound-specific up to +350°C)


O-Ring KITS- For O-Ring Kits, O-Ring Splicing Kits, O-Ring Gauges and Lube. For more information on these and our extensive range of other kits, please visit our Kits Section.


Chemical Processing, Semiconductor wafer fabrication, Food and Pharmaceutical, Oil and Gas, Compressor Pump and Valve, Automotive, and Aerospace

Associated Products

We also stock Quad Rings / Nu-lip Rings, O-Ring Cord, Sheeting and Tubing, Anti-extrusion Rings, Back-up Rings, Sealant and Adhesives, O-Ring material tester/gauge, O Ring Lube.


For detailed technical information about our O-Rings download the brochure below, visit our Technical Support page or contact a member of the team today.