Customized molded rubber washer/flexible silicone gaskets

A molded rubber washer should match the support beneath its contact band as well as the opening it surrounds. Flexible silicone gasket versions can be customized for different outlines, but each needs a defined seat and closing gap. The visible outside dimensions alone do not show whether the rubber is supported where force is applied.

Check thickness, inner clearance, and the condition of the mating faces. Select the formulation for the actual medium, temperature, and movement at the joint. Keep any shaped transitions or narrow regions from bridging an unsupported recess.

Place the part flat and aligned before closure. Inspect for twisting or an edge pushed beyond its seat as fasteners engage. During maintenance, compare the old washer's deformation with the underlying hardware. Correct an uneven face or off center load before fitting a replacement, rather than adding thickness to hide the difference and changing contact across the rest of the joint. Preserve the complete selected profile during service.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Flexible silicone gasket versions can be customized for different outlines, but each needs a defined seat and closing gap.

Custom dimensions

Check thickness, inner clearance, and the condition of the mating faces.

Fit & assembly

Place the part flat and aligned before closure.

Use & inspection

Correct an uneven face or off center load before fitting a replacement, rather than adding thickness to hide the difference and changing contact across the rest of the joint.

Photos illustrate structure or material only. A molded rubber washer should match the support beneath its contact band as well as the opening it surrounds. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.