Delivering Fluid Sealing Solutions Since 1972

Silicone O Rings (VMQ)

Silicone O Rings (VMQ) – Available From UK Stock

M Barnwell Services carries an extensive inventory (50+ million units) of O Rings and Back-Up Rings, including regular distribution of Silicone O Rings (VMQ) to 500+ clients.

Our Silicone (VMQ) seals encompass a broad temperature spectrum and showcase exceptional resistance to ozone, weathering, and aging. They also possess favorable insulating and neutral properties.

For assistance in selecting the ideal product for your needs, contact our knowledgeable team to guide you through the process.



Swift and cost-efficient O-Ring production is available using our stock materials, with the option to extrude custom sections in unique materials, colours, sizes, or hardnesses as needed.

For applications where joining is unsuitable, O-Rings can be molded with a minor tooling cost.

We keep cords in stock, convertible into O-Rings with the following material variations:

  • Wide temperature range options.
  • Shore hardness spanning 40-70° shore A.
  • Metal-detectable variants are favoured in the Food and Beverage, and Pharmaceutical industries.
  • Fluorosilicone type, boasting heightened resistance to fuels and volatile liquids.
  • Sponge grades, including FDA-approved sponges.

Silicone O Ring (VMQ) Benefits

  • Available in a multitude of sizes and hardness levels.
  • Both sponge and solid options.
  • A choice between joined or molded versions.
  • Outstanding resilience against weathering, ozone, and UV exposure.

Silicone O Ring (VMQ) Limitations

While Silicone rubber may exhibit comparatively lower tensile strength and weaker tear and wear resistance than other elastomers, it boasts notable cold flexibility (-60°C to +250°C) and can endure water up to 100°C. This renders it particularly suitable for Food and Beverage, Brewing and Bottling, and Pharmaceutical sectors.

Regarding chemical resistance, Silicone fares well with engine/transmission oil, animal/vegetable oil, non-petroleum brake fluids, fire-resistant hydraulic fluids, and some chlorinated hydrocarbons, as well as moderate water resistance and diluted salt solutions.

However, we advise that Silicone is ill-suited for applications involving superheated steam (>121°C), acids/alkalis, certain chlorinated hydrocarbons, mineral oil, hydrocarbon fuels, and aromatic hydrocarbons.

Application Examples

  • Seals and Gaskets.
  • Cryogenic applications.
  • Pumps, connectors, and valves.

For further material insights about Silicone O Rings and VMQ O Rings explore our Material Properties page. Alongside O Rings, we also stock a range of Silicone Cords and Silicone Gaskets.

To delve deeper, download our catalogue, or contact a member of the team.


No limitation to dimensions with over 10,000 different sizes available from stock. Bag or selection box upon request


Silicone (VMQ)


O-Ring Metric and Imperial Kits, Selection Boxes, Splicing Kits & Top-up Bags are available

Bespoke O Ring Kits and selection Boxes are also available

Associated Products

Encapsulated O-Rings (FEP/PFA), Lube, Gauge / O Ring material tester, Quad Rings® (X-Rings) / Nu-lip Rings, O-Ring Cord, Tube, Anti-extrusion Rings, Splicing Kits, Back-up Rings, Anti-extrusion Rings, Lubricants and Adhesives