Delivering Fluid Sealing Solutions Since 1972

Vulcanised O Rings

Vulcanised O Rings – Speedy and competitively priced alternative to Moulded Seals for diverse applications

In addition to the standard M Barnwell Services moulded O Rings we can also supply Hot Vulcanised O Rings and Room Temperature Vulcanised (RTV) O Rings.

Our O Rings are used in many industries across varied applications owing to the manufacturing process and range of materials. This removes the need for expensive tooling costs and provides rapid delivery lead times.


They are available in a variety of elastomers including Viton®, Nitrile (NBR), EPDM, and Silicone (VMQ) with other materials available on request. These can also be compliant to industry specifics such as FDA, 3A, USP Class VI, Metal / X-Ray Detectable and EU 1935. Generally, they offer joint strength close (90%) to that of a moulded O Ring with compliance to ISO 3601-3 and Grade CS if required.

Other benefits include:

  • Low compression set values – as low as 5.9%
  • Selected range meet E1 or tighter tolerances
  • CSDs ranging from 1.78mm to 40mm with no upper limit on ID
  • Emergency / Turbo Charge service available
  • Stock inventory for call-off orders

Recommended for static applications only.

Hot Vulcanised O Ring, Ground Finish

Learn more about our range of O Rings or contact a member of the team.


O-Ring SIZES- over 9000 sizes of O-Rings available from micro-miniature. E & OE


O-Ring materials - including Nitrile (NBR), Viton® (FPM), Silicone (VMQ) . Others available on request.

(Viton® is the registered trade mark of DuPont® Performance Elastomers.)


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.

Associated Products

O-Ring associated products - we also stock Quad Rings / Nu-lip Rings, O Ring Cord(extruded), Sheeting and Tubing, Anti-extrusion Rings, Adhesives and our new O Ring material tester.