Silicone rubber ring waterproof seal small rubber o rings

Small rubber o rings need careful handling because a twist or small particle can affect a substantial portion of their contact area. This silicone ring option can be customized in size and hardness for a compact sealing location. The ring dimensions should be selected with the groove and mating parts that control its compression.

Distinguish the inside diameter from the cross-section when comparing sizes. Two rings may have similar overall diameters yet occupy the groove differently. The groove width and depth must provide the intended space for the selected section once the assembly is closed.

Keep the ring clean during installation and avoid stretching it over unnecessary sharp features. After positioning, check that it lies evenly rather than rolling into a twist. Close the mating parts in the intended alignment so that the ring does not become pinched at one side. Where water exposure is involved, assess the complete joint under its actual operating conditions. Replace a seal that has cuts or a lasting flattened shape instead of trying to restore it by stretching.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The ring dimensions should be selected with the groove and mating parts that control its compression.

Custom dimensions

The groove width and depth must provide the intended space for the selected section once the assembly is closed.

Fit & assembly

Close the mating parts in the intended alignment so that the ring does not become pinched at one side.

Use & inspection

Replace a seal that has cuts or a lasting flattened shape instead of trying to restore it by stretching.

Photos illustrate structure or material only. The groove width and depth must provide the intended space for the selected section once the assembly is closed. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.