Omniseal® Metals

Metal Comma Seals

Comma axial seals used for shaft sealing and bore sealing are a further development of the axial C-Seal. The elastic recovery in radial direction is still limited, yet the leakage over the outer diameter in the case of a Comma seal is well controlled by the seating load generated by the compression of the ring part of the design.

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Silver, gold or copper plating enhances tightness performance and lowers friction during assembly and operation.


They are typically used in valves, semi-dynamic applications, connectors and in areas that need rod seals and piston seals.

Is this Component PFAS-Free*?

By its nature, this component is PFAS-Free*.

Contact our engineers to learn more and start the discussion on how we can support you to meet the requirements of your application.

* PFAS-Free here means we do not intentionally add PFAS material in the product, but does not exclude the possibility of traces, as these materials are common in the environment.

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Design engineering

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Seal Function & Motion


Mating Surface Finish

Along with having an excellent surface finish, it is also important that the mating surface has a sufficient hardness. For high abrasive dynamic applications, a hardness higher than 60 HRC is recommended.

ASE Group


Our Comma seal design is developed to seal better than a typical axial C-Seal. It also allows a better control of the seating load and hence a better seal performance. 

Industry Case Studies

Take a closer look at case studies that detail this metal seal's high performance.