Customized waterproof rubber washer/silicone rubber O-ring

A silicone rubber O-ring seals through its relationship with the surrounding groove and mating components. The ring needs the appropriate dimensions and compression for that arrangement, while the material formulation must suit the intended medium and operating conditions. Stretching a ring around a feature is not enough to establish a suitable seal.

Inspect the groove and the path the ring takes during assembly. Sharp entries can damage the surface, and a rolling motion may twist the cross-section before the joint is closed. Keep particles away from the contact area and use only assembly methods appropriate to the selected material and application.

Evaluate water exclusion in the complete joint under the specified conditions. The silicone name alone does not establish a waterproof rating or pressure capability. When the connection is opened, examine the ring for cuts, flattening, or a localized wear pattern. If damage repeats at the same position, investigate the groove, entry geometry, and movement of the mating parts rather than assuming a fresh ring will provide a lasting correction.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. The ring needs the appropriate dimensions and compression for that arrangement, while the material formulation must suit the intended medium and operating conditions.

Custom dimensions

If damage repeats at the same position, investigate the groove, entry geometry, and movement of the mating parts rather than assuming a fresh ring will provide a lasting correction.

Fit & assembly

Keep particles away from the contact area and use only assembly methods appropriate to the selected material and application.

Use & inspection

Sharp entries can damage the surface, and a rolling motion may twist the cross-section before the joint is closed.

Photos illustrate structure or material only. A silicone rubber O-ring seals through its relationship with the surrounding groove and mating components. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.