Custom made waterproof rubber washer/thin rubber gasket

A waterproof rubber washer needs a continuous contact band between its mating faces under the actual water exposure. A thin section should be supported across that band so it does not curl into an opening as the joint closes. The inner and outer dimensions matter together with thickness and the selected compound.

Check the faces for grooves, shoulders, or uneven features that may concentrate compression. The rubber should suit the actual water conditions, temperature, and cleaning substances. A thin gasket version with a different outline requires its own alignment and support rather than being treated as a simple diameter substitution.

Position the part carefully on clean surfaces and close the joint evenly. Inspect for a folded inner edge where accessible, then assess the completed connection under its intended conditions. During service, compare any leakage location with the old washer's contact pattern. Correct the mating surface or locating issue where relevant instead of assuming a softer replacement will seal a gap that the original geometry did not support.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Check the faces for grooves, shoulders, or uneven features that may concentrate compression.

Custom dimensions

A thin section should be supported across that band so it does not curl into an opening as the joint closes.

Fit & assembly

A thin gasket version with a different outline requires its own alignment and support rather than being treated as a simple diameter substitution.

Use & inspection

Correct the mating surface or locating issue where relevant instead of assuming a softer replacement will seal a gap that the original geometry did not support.

Photos illustrate structure or material only. A thin section should be supported across that band so it does not curl into an opening as the joint closes. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.