about us

DMR Seals Ltd is a UK manufacturer of engineered sealing solutions, offering a wide range of products including high performance O-Rings, Spring Energised Seals, Guide Rings, Rotary Shaft Seals, Wiper Seals, Rod Seals, Piston Seals, Back-up Rings, PTFE Seals and other high-performance seal parts.

At our site in Sheffield we design, manufacture and supply over 253 different seal profiles in Elastomer, Polyurethane, PTFE, Thermoplastic and Fluoropolymer materials as standard, which places us in a strong position to meet any seal application, no matter how demanding.

Whether you need hydraulic seals or PTFE lip seals, rotary lip seals or o-ring seals, we are confident we will have a seal application solution that is either available off the shelf or through using our comprehensive seal design service to provide a truly customised sealing solution.

We have over 200 years collective experience, with many of our senior staff members having worked in the sealing industry for over 25 years. Our industry recognised seals are used across a broad range of industries including Oil & Gas, Chemical Processing, Food, Pharmaceutical, Hydraulics and Pneumatics.

Our seals set the industry standard thanks to strong working relationships with our clients where we spend time building up an understanding of their application needs and the challenges they face. With this information, our expert team of seal designers can provide custom sealing solutions that not only meet the demands placed on them but exceed them too.

A Division of Diploma PLC

DMR Seals is a division of Diploma PLC – an international group of businesses supplying specialised technical products and services to focus market sectors. Diploma’s “Acquire, Build, Grow” strategy is designed to deliver strong, double-digit growth year on year.

For more information on this please visit www.diplomaplc.com

our history

Trade association memberships and certifications


DMR Seals is proud to be members of the following trade associations:

DMR Seals holds the following certification:

ISO 9001

ISO 14001

ISO 18001

our values



It is important to reduce downtime for our customers, so we respond with bespoke designs, solutions and manufactured products swiftly.


We get to know our customers and their business well, so we can communicate in a familiar manner and provide individual solutions that work for them.


We share our knowledge across the group of companies to continually improve our offering to customers.



We design and manufacture high quality products and have an outstanding service level to match.


We work with the M Seals teams and other Diploma companies to provide a cohesive approach for customers globally.



We work together to provide the best service for our customers.