Rubber Square Gasket Black Waterproof Oil Seal

A Rubber Square Gasket forms a custom seal along a square outline. Its corners need to match the joint as accurately as its straight dimensions, so the sealing material remains supported when the faces close. The black appearance is a color choice; oil and water exposure requirements must be addressed by the selected compound and assembled fit.

Inspect the seating corners for radii, steps or interruptions that can lift the rubber. Place the gasket without stretching one side to reach a fastening point. Choose its thickness around the intended closed gap rather than stacking parts to compensate for an uneven joint. Evaluate the finished seal with the actual contacting medium and operating conditions. During disassembly, examine each corner for a fold or permanent deformation that differs from the straight runs. Clean residual material from the faces before fitting a replacement. If damage repeatedly occurs at one corner, correct the support or alignment there instead of relying on a softer gasket to fill the mismatch.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. If damage repeatedly occurs at one corner, correct the support or alignment there instead of relying on a softer gasket to fill the mismatch.

Custom dimensions

Choose its thickness around the intended closed gap rather than stacking parts to compensate for an uneven joint.

Fit & assembly

The black appearance is a color choice; oil and water exposure requirements must be addressed by the selected compound and assembled fit.

Use & inspection

Clean residual material from the faces before fitting a replacement.

Photos illustrate structure or material only. A Rubber Square Gasket forms a custom seal along a square outline. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.