Heat resistant rubber washer for sealing

A rubber washer for sealing must maintain the intended contact between its mating surfaces under the application's operating conditions. Where heat is present, the selected formulation, joint geometry, and compression all matter. A washer that seals in a cool initial assembly still needs assessment at the relevant temperature and after the operating cycle.

Choose the inner opening, outside diameter, and thickness for the actual seating area. The hard components should support the working ring without cutting into it or leaving a large unsupported portion. Tightening needs to create appropriate compression rather than simply squeezing the washer as flat as possible.

Evaluate the completed connection for its specified fluid and thermal exposure. The heat-resistant description does not establish a universal temperature limit or compatibility with all media. On disassembly, inspect the washer's compression pattern and edges for extrusion, cuts, or lasting uneven deformation. Repeated damage at the same location may indicate a problem with the joint face or loading arrangement, which replacing the rubber alone will not resolve.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Set the washer grade for compression across the actual seating area, checking that the selected section remains supported at its inner and outer edges.

Custom dimensions

Choose the inner opening, outside diameter, and thickness for the actual seating area.

Fit & assembly

A washer that seals in a cool initial assembly still needs assessment at the relevant temperature and after the operating cycle.

Use & inspection

A rubber washer for sealing must maintain the intended contact between its mating surfaces under the application's operating conditions.

Photos illustrate structure or material only. Where heat is present, the selected formulation, joint geometry, and compression all matter. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.