OEM silicone seal for hole EPDM rubber o-ring gasket

A silicone seal for an opening needs its geometry matched to the opening and the feature that closes against it. This custom ring offering includes EPDM material options, with the compound selected for the actual environment. The hole size alone does not define the full sealing arrangement.

Identify whether the ring sits around a fitting, within a groove, or between mating faces. Each arrangement controls the section differently. The inside opening, supported width, and thickness should follow that seat so that the rubber remains in its intended position during closure.

Select the formulation for the contents and temperature, then install the ring on clean surfaces. Check that it has not twisted or caught against the edge of the opening. Bring the mating component into place without dragging the seal sideways. During servicing, inspect the inner edge as well as the broad face for damage. A replacement should reproduce the specified material and section instead of being chosen only because its opening passes over the same feature.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. Match the selected grade to the supported width and closing gap so the rubber can compress while remaining located around its inside opening.

Custom dimensions

A silicone seal for hole use needs its geometry matched to the opening and the feature that closes against it.

Fit & assembly

Select the formulation for the contents and temperature, then install the ring on clean surfaces.

Use & inspection

During servicing, inspect the inner edge as well as the broad face for damage.

Photos illustrate structure or material only. The inside opening, supported width, and thickness should follow that seat so that the rubber remains in its intended position during closure. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.