Square seal waterproof rubber gasket neoprene washer

A neoprene washer used in a square sealing arrangement should be developed around the joint's contact faces and available compression. The square outline needs defined corner radii and supported edges so the rubber can sit without folding. A matching overall width alone does not establish a suitable seal profile.

Custom dimensions, hardness and color can follow the assembly. Select the neoprene formulation for the water exposure, temperature and cleaning conditions. Any waterproofing requirement should be assessed with the complete joint and its closing arrangement.

Clean the mating surfaces before fitting and locate the washer without concentrating stretch at a corner. Check that closing movement does not drag one side outside the seat. During maintenance, inspect the hidden faces for cuts, residue or lasting compression marks. If leakage or deformation recurs at one corner, review the local mating geometry and closure sequence. A harder washer may change compression behavior without correcting an unsupported region or uneven joint alignment that continues to disturb the seal.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Check that closing movement does not drag one side outside the seat.

Custom dimensions

The square outline needs defined corner radii and supported edges so the rubber can sit without folding.

Fit & assembly

A harder washer may change compression behavior without correcting an unsupported region or uneven joint alignment that continues to disturb the seal.

Use & inspection

During maintenance, inspect the hidden faces for cuts, residue or lasting compression marks.

Photos illustrate structure or material only. A neoprene washer used in a square sealing arrangement should be developed around the joint's contact faces and available compression. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.