Custom made special-shape rubber sealing washer/gasket

A custom rubber sealing washer can include a shaped perimeter and openings positioned for the assembly. This is useful when a standard circular washer would leave parts of the intended interface uncovered or interfere with nearby features. The dimensions should describe the complete contact path rather than only the overall size.

Where several openings are present, their relationship establishes alignment. A small positional difference can stretch the rubber around one feature while allowing another area to lift. Check the mating component and the locating arrangement before selecting the final thickness and material.

Install the washer without pulling it across its holes to make it fit. Each opening should settle around its intended feature while the surrounding section remains flat. Choose the compound for the medium, temperature, and cleaning process at the joint. During closure, keep the mating parts aligned to avoid dragging the washer sideways. If the assembly is reopened, inspect the bridges between openings as well as the outside edge, since damage in those narrow areas may be less obvious.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. A small positional difference can stretch the rubber around one feature while allowing another area to lift.

Custom dimensions

A custom rubber sealing washer can include a shaped perimeter and openings positioned for the assembly.

Fit & assembly

Install the washer without pulling it across its holes to make it fit.

Use & inspection

Choose the compound for the medium, temperature, and cleaning process at the joint.

Photos illustrate structure or material only. The dimensions should describe the complete contact path rather than only the overall size. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.