Omniseal® Metals

Metal C Seal External Face
Metal C-Seals

Metal face C-Seals help overcome both heat and pressure pulsating sealing challenges. The key to the seal's superior performance is the high springback characteristic due to the C-shaped construction. These highly resilient seals can be used for internal, external, and axial pressures under extreme conditions that preclude the use of gaskets made of organic materials. 

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Where very low leak rates are demanded, C-Seals are plated or coated to provide a relatively soft surface, which then flow into the minor imperfections of the flanges at installation.


Typical applications include heat exchanger in Oil & Gas, Laser Equipment, Cryo-coolers, Cask seals in nuclear waste, boss seal, injection molding, and aviation fuel and air systems.

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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Seal Function & Motion



C-Seals will undergo plastic deformation when installed at the 20% recommendation.

Omniseal® Metal C-Seals


In the seal selection process, you should always keep in mind basic design criteria. There is a direct relationship between seal outer diameter (OD) and the seal free height. Larger free heights provide better resilience and performance tends to be more consistent.

Industry Case Studies

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