The Function and Design of Rubber O-rings. These products are extensively used in mechanical systems for the purpose of sealing different types of fluid and air flows. They are mounted into the grooves or cavities of the system, where they deform to prevent any air or liquid from escaping.

A rubber O ring is a mechanical gasket in the shape of a torus or donut and is used for static and dynamic applications where there is relative motion between parts and the possibility of friction.