Heat-resistant square rubber silicone washer/rubber seal gasket

A square rubber silicone washer follows a defined outer footprint around its central opening. The square perimeter can suit a matching contact area, provided the corners remain supported and clear of adjacent features. Its section and bore must also match the way the joint is assembled.

For a heat-exposed use, choose the silicone formulation according to the conditions at the washer itself. Include the contact medium and the duration of heating when evaluating the configuration. A square shape does not imply a different thermal limit from another profile made in the same formulation.

Place the washer in the intended orientation before securing the joint. Check that a corner has not caught beneath a nearby feature or turned out of the contact area. Use the assembly's specified fastening method and assess the joint under its required operating cycle. During replacement, inspect the corner regions of the mating face for damage so a localized obstruction does not distort the new washer in the same way.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Choose silicone compliance around the square perimeter and corners, keeping the contact supported when the opposing faces compress the washer.

Custom dimensions

A square shape does not imply a different thermal limit from another profile made in the same formulation.

Fit & assembly

Use the assembly's specified fastening method and assess the joint under its required operating cycle.

Use & inspection

During replacement, inspect the corner regions of the mating face for damage so a localized obstruction does not distort the new washer in the same way.

Photos illustrate structure or material only. The square perimeter can suit a matching contact area, provided the corners remain supported and clear of adjacent features. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.