O-rings – reliable, cost effective sealing solutions

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O-rings are one of the most frequently used products in sealing applications. O-rings are relatively inexpensive and reliable. Applications range from garden hose couplings to critical aerospace or chemical plant duties.

Eastern Seals currently holds stock of more than 80 million rings across 10,000 individual sizes. Our large volume of stock ensures we stay competitive for all enquiries, no matter how large or small. We offer same day despatch for next day delivery, with short lead times on non-stock items.


O-rings come in many styles and shapes. The material required depends on temperature, pressure, chemical, and other environmental factors. Materials such as EPDM, Nitrile, Buna-N, Silicone and FKM are just a few of the materials that we supply.

We can also supply O rings with an X cross section. These are better known as an X-Ring or a Quad Ring.

We supply all standard types of materials in a range of Shore Hardnesses and colours. In addition to standard imperial and metric sizes, Eastern Seals also stocks a wide variety of non-standard sizes. Materials include; NitrileSiliconeEPDMFKM, VitonFluorosilicone and HNBR.

Eastern Seals supply the following specialist high grade materials:


FFKM has excellent resistance to chemicals and extreme temperatures. Special compounds can operate beyond 300°C. FFKM is resistant to most chemicals including inorganic acids, alkalines, ketones, esters, alcohols, fuels, and hot water. It is ideal for applications in aggressive chemical environments.

Our Standard FFKM compound has outstanding heat resistance with service temperatures of -10°C to 310°C. Eastern Seals can offer direct equivalents to Kalrez® Simrez® Perlast® Chemraz® grades. To find out more on our FFKM compounds, please visit our FFKM Perfluoroelastomer O-Rings page.


Explosive Decompression (ED) is also known as Rapid Gas Decompression (RGD). This condition occurs after an elastomer is exposed to a gas laden fluid in the presence of high pressure. The pressure compresses the gas and forces it into the small spaces of the elastomer. If the rate of decompression happens quickly, the gas expands beyond the materials ability to contain the gas bubbles. This then causes fissuring, resulting in seal failure.

Eastern Seals offer Norsok M-710 Certified Anti-Explosive Decompression (AED), Explosive Decompression Resistant (EDR) O-Rings at very competitive prices. Our wide range of NORSOK approved materials are suitable for a variety of critical services and applications. We supply a range of formulations within the HNBR, FKM B, FKM GLT and FFKM materials that have passed the NORSOK M-710 requirements.


We can supply O-rings to all commonly recognised Military Specifications and Aerospace Standards. E.g. AMS-R-83485. This specification covers high temperature, compression set, and fluid resistant fluorocarbon elastomer sheets. It also covers strips, molded parts, and extruded shapes for aeronautical and aerospace applications. This material differs from other fluorocarbon elastomers because of its improved low temperature performance.

Eastern Seals understand our customers’ requirements. As standard, all of our products are clearly marked with fully traceable part numbers, batch numbers and cure dates. This information is visible in both in text and barcode formats.



If you have any queries, or would like any more information,
don’t hesitate to get in touch

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We are the largest supplier of British Standard, Metric series O-rings and sealing solutions.

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