Customized waterproof silicone rubber washer/square rubber gasket

A square rubber gasket follows a joint with distinct corners as well as straight sides. The corner radius and support there need to suit the mating components; matching the overall width alone can leave the ring compressed unevenly or lifted at a turn.

Review the complete seating path and the fastening positions. A cover may close more firmly near screws while leaving a different gap along the middle of a side. The gasket profile should suit those assembly conditions without relying on excessive tightening to force the corners into place.

Lay the gasket without twisting or stretching it around the square path, and check that it remains positioned as the cover closes. Evaluate waterproof performance on the assembled joint under its specified exposure. During inspection, compare the corners with the straight sections for pinching, displacement, or lasting deformation. Repeated damage in one corner may reflect a local fit or alignment problem rather than a need to change every dimension of the gasket.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Lay the gasket without twisting or stretching it around the square path, and check that it remains positioned as the cover closes.

Custom dimensions

Repeated damage in one corner may reflect a local fit or alignment problem rather than a need to change every dimension of the gasket.

Fit & assembly

Review the complete seating path and the fastening positions.

Use & inspection

During inspection, compare the corners with the straight sections for pinching, displacement, or lasting deformation.

Photos illustrate structure or material only. matching the overall width alone can leave the ring compressed unevenly or lifted at a turn. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.