Rubber products manufacturer flat silicone rubber washer

A flat silicone rubber washer can be positioned around a shoulder or central feature to create a defined face contact. The locating diameter should let the washer sit flat without being stretched over a step that leaves its inner edge distorted. Its outside diameter needs support where the adjoining surface applies the closing force.

Check the available axial gap and the shape of both mating faces. A washer partly resting on a fillet may tilt before the joint closes, producing uneven compression. Choose the silicone compound for the medium and temperature at that position, and assess any sealing requirement using the complete joint.

Set the washer in place before bringing the opposing part down. Keep the contact faces free of particles that could be pressed into the rubber. On disassembly, examine the inner edge for a persistent ridge or cut that corresponds to the shoulder geometry. Correct that interface where needed rather than replacing the washer with a tighter bore that further concentrates contact at the same location.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The locating diameter should let the washer sit flat without being stretched over a step that leaves its inner edge distorted.

Custom dimensions

Choose the silicone compound for the medium and temperature at that position, and assess any sealing requirement using the complete joint.

Fit & assembly

Check the available axial gap and the shape of both mating faces.

Use & inspection

Correct that interface where needed rather than replacing the washer with a tighter bore that further concentrates contact at the same location.

Photos illustrate structure or material only. A washer partly resting on a fillet may tilt before the joint closes, producing uneven compression. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.