Custom molded rubber silicone seal ring/transparent rubber washer

A transparent rubber washer can be custom molded around a central opening and the contact area surrounding it. The hole may locate around a fitting or another assembly feature, while the outside boundary needs to remain supported by the mating surface. The visible material can assist positioning during installation.

Measure the central feature and the available radial space independently. A washer with the right outside size may still bind at its inner edge, causing it to lift or distort before the joint closes. Select the section thickness from the compression and clearance intended for the assembly.

Choose the compound for the actual medium and temperature, then fit the washer without forcing its opening over a damaging edge. Check that it lies flat around the locating feature. During closure, watch for sideways movement that could leave only part of the washer under the mating face. Clean the seating area during maintenance and examine both the inner and outer edges for damage. Preserve the specified opening size when selecting a replacement.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. During closure, watch for sideways movement that could leave only part of the washer under the mating face.

Custom dimensions

Select the section thickness from the compression and clearance intended for the assembly.

Fit & assembly

The hole may locate around a fitting or another assembly feature, while the outside boundary needs to remain supported by the mating surface.

Use & inspection

Clean the seating area during maintenance and examine both the inner and outer edges for damage.

Photos illustrate structure or material only. A washer with the right outside size may still bind at its inner edge, causing it to lift or distort before the joint closes. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.