Gamma Seals come in two styles, RB and 9RB. The gamma seal consists of two parts; sealing member and case. The gamma seal is designed to be fixed to the surface at a predetermined distance from the sealing surface, which is positioned perpendicularly to the shaft (eg the end wall of a bearing housing). During rotation the sealing lip rubs against the counter face under a contact pressure which is calculated to achieve a sealing function.

The seal also operates as a deflector ring with its centralfugal action contributing to excellent sealing function.

The gamma seal is primarily intended to for sealing against foreign matter such as liquid splatter and grease. However, it can also operate as a liquid seal under certain conditions. Typical applications include: Ball and Roller Bearing Housings, Electric Motors, Power Saws and Wheel Hubs. In Combination with a rotary shaft seal the gamma seal can either operate as a dirt seal or as a shield against oil flow.

Gamma Seals are available in two styles. The RB style comes with a metal ring which protects the rubber from damaged. In the 9RB style the metal ring is extended in the axial direction on the outer sheath.