Delivering Fluid Sealing Solutions Since 1972

UK Manufactured FFKM Seals

Short lead times, all round chemical resistance, high temperature capability – the leading UK manufactured FFKM Seals / O Rings.

M Barnwell Services are one of the UK’s largest independent, stockist and distributor of UK Manufactured FFKM Seals / O Rings, Medical Seals, Spring Seals and Back-Up Rings. With 50 million in stock, £4.2 million inventory, we supply to over 5000 customers globally every month – quickly and reliably.

The range of UK manufactured FFKM Seals (Perfluoroelastomer) offer the most chemically resistant elastomer available and is effectively a rubber form of PTFE. This material grade is at the forefront of polymer technology, offering properties which prove most valuable in critical sealing applications where purity, high temperatures and retention of sealing force are paramount. This makes it ideal for the Food and Pharma, Chemical Processing, Oil and Gas, and Semiconductor industries.

Customers can count on M Barnwell Services for short lead times and guidance on material selection for their sealing application. Our experienced team will guide all aspects of production, including prototyping, testing, and final part manufacture. Depending on the application M Barnwell Services and it’s manufacturing partners offer full batch traceability throughout the manufacturing process.

Features of the UK Manufactured FFKM Seals:

  • High temperature stability up to 327°C (620°F)
  • Low-temperature capability down to -46°C (-51°F)
  • Almost universal chemical resistance
  • Outstanding mechanical properties
  • High purity materials for reduced process contamination for semiconductor applications
  • FDA, USP Class VI and 3A 18-03 compliance for food and pharmaceutical applications
  • Rapid Gas Decompression (RDG) resistant materials for high pressure environments for oil and gas applications

FFKM Chemical Resistance

If you would like more information about our range, contact a member of the team or for further reading, visit the Perfluoroelastomer (FFKM) Seals overview, and Extreme Seals pages.

Do you need an alternative to Kalrez®? Do You Require Next Day Delivery?

FFKM / Perfluoroelastomer Seals and O Rings are available in MBMS, Perlast®, Simriz™, Elast-O-Lion®, Parofluor®, Kalrez®, Chemraz®, Isolast®, Ekraz® 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.

UK’s Leading O Ring Supplier and Sealing Specialist

We have an extensive range of seal materials including Perfluoroelastomer (FFKM), Nitrile (NBR), Hydrogenated Nitrile (HNBR), Viton™ (or FKM/FPM)Viton™ A, Viton™ B, Viton™ GF, Viton™ GLT, Viton™ GFLT, Viton™ ETPEthylene Propylene (EPDM)Silicone (VMQ), Polytetrafluoroethylene (PTFE) Fluorosilicone (FVMQ) and Medical Grade. These can all be measured to imperial (BS1806, ISO 3601) and metric (BS4518) sizes, shore hardness and to a range of International, National and industry specifications, grades and approval standards.

We also offer a comprehensive range of quality FEP/PFA Encapsulated Rubber Seals, O Ring Cord and Hot Vulcanised Seals.

uk manufactured ffkm seals


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). Others on request


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