Delivering Fluid Sealing Solutions Since 1972

PTFE Seals

PTFE Seals – We Are Experts in Non-Stick Sealing Solutions

M Barnwell Services are the UK’s leading stockist, distributor, and manufacturer of PTFE Seals. With over 50 years of experience and industry-leading technical support, our customers can be confident that they will receive the correct product for their application.

PTFE (Polytetrafluoroethylene) sealing products are recommended for use in many industrial applications. These include:

PTFE Seals Gaskets

In comparison to standard sealing solutions, PTFE seals can present further distinctive features. The most important of these features is low friction at high pressures, however, when designing long-lasting and dependable sealing systems other important factors to take under consideration are high abrasion resistance, extreme chemical compatibility, and low stick-slip.

Popular PTFE seal products include:

PTFE’s sealing efficiency is usually poorer than that of a standard elastomer solution. For an efficient system operation, it’s crucial to carefully consider the general specification.

Benefits of PTFE Seals:

  • Simple installation
  • Low stick-slip
  • High media compatibility
  • Low friction at high pressures and speeds
  • High abrasion resistance

ptfe seals

For more information, please contact our team of seal experts.

E & OE.

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O Rings - No limitation to dimensions with over 10,000 different sizes available from stock

Oil Seals - Over 9000 sizes of Rotary Shaft Seals are available from stock. Metric sizes range from 4mm to 480mm shaft diameter. Imperial range from 1/4" to 19" shaft diameter. Many more specials made to order.

Hydraulic and Pneumatic Seals - Over 8000 sizes available from Metric 3mm to 1800mm and Imperial 1/8" to 71".


Special sizes available from our SealMaker manufacturing service.

Temperature Range

Between -185°C and +250°C (intermittent/compound-specific between -200°C and +260°C)
Melting point at approximately +327°C

Styles & Profiles

Oil Seals - Styles - Rubber Covered, Metal Cased and Totally Metal Enclosed.

M Barnwell Services Types - DIN3760, A, B, AS, BS, S, SAS, L, ABG, BG, G, EXT-R, EXT-L, SP, ADP (Hydrodynamic Lip) & High Pressure, Combi, & Cassette Oil Seals (Please refer to catalogue).

Hydraulic and Pneumatic Seals - Comprehensive range of Rod, Piston and Wiper Seals for both single and double acting cylinders including: Pressure Seals, Buffer Seals, Vee Packs, U Rings, Guide Rings, Wear Rings, Twin Sets, Cup Seals, Dri Rod Seals, Fluid Seals, Chevron Seals, Internal and External Distributor Seals, Hat Seals, Wyclips, Energised Seals, Solosele Seals and many more.

Gaskets - Refrigeration Compressor, Camlock, Tri-Clover, Spiral Wound, Metallic, Rocker Cover, Heat Exchanger, Soft Cut, Exhaust, Cylinder Head, Sump Shims, Precision Washers, Heat Shield, Diaphragms


O Rings - British Imperial (BS1806) and Metric (BS4518). European Metric (ISO 3601), including German (DIN 3771), Swedish (SMS 1586/1588) and French (NFT 47 501). American (SAE, AMS, AS568) and Japanese Metric (JISB 2401).

Oil Seals - BS1399 (BS-ISO 6194), DIN3760 and many more

Hydraulic and Pneumatic Seals - To suit DIN/ISO, ISO 5597, ISO 5597/1, ISO 7425/1, ISO 7425/2, ISO 7425/1 TEIL 1, ISO 6457/1


O Rings - WRC, WRAS, FDA, EC1935/2004 & EC2023/2006, DVGW, KTW, BGVV, KIWA, USP Class VI, NSF, ACS, EU2002/72, EN681-1, EN549, 3A Sanitary, NORSOK and EN682


O Rings - Metric and Imperial Kits, Selection Boxes, Splicing Kits & Top-up Bags are available. Bespoke O Ring Kits and selection Boxes are also available