rubber gasket/rubber seal/Oil proof rubber washer

A rubber washer used at an oil exposed connection should sit on a supported face that controls its compression. The inner diameter needs clearance around the intended feature without leaving the washer free to drift away from the sealing path. Its outer edge should remain within the area supported by the mating component.

Select the formulation for the actual oil, temperature, and cleaning process. The mixture contacting the part may differ from the primary fluid if additives or residue are present. Choose thickness around the joint's closing gap rather than using more rubber to hide a damaged or uneven face.

Center the washer before fastening and keep rotating hardware from dragging it into a crease. Assess sealing on the completed joint under its intended conditions. During service, inspect the inner edge for extrusion and the face for uneven flattening. Correct a supporting surface or closing alignment issue before replacement so the next washer is not loaded against the same defect that affected the previous part.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. A rubber washer used at an oil exposed connection should sit on a supported face that controls its compression.

Custom dimensions

The inner diameter needs clearance around the intended feature without leaving the washer free to drift away from the sealing path.

Fit & assembly

Center the washer before fastening and keep rotating hardware from dragging it into a crease.

Use & inspection

During service, inspect the inner edge for extrusion and the face for uneven flattening.

Photos illustrate structure or material only. An oil-joint washer needs enough center clearance without room to drift off its sealing path. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.