Gaskets for sealing/rubber waterproof o-ring seals flat washers

Gaskets for sealing provide a rubber interface between adjoining components. The custom shape may use a flat washer section or a round O-ring section, depending on the receiving joint. These forms need different support and compression arrangements even when their overall diameters are similar.

Start with the groove or mating faces. A flat section needs enough supported width, while a round section must fit the space provided for its deformation. The opening, fastener arrangement, and final closed position of the joint all influence the required dimensions.

Select the compound for the medium and temperature, including any cleaning exposure. Fit the gasket onto clean surfaces without twisting or stretching it beyond the intended geometry. Inspect the position as the parts close so no section becomes trapped outside the sealing area. Any required waterproof performance should be assessed on the complete joint under its expected conditions. During maintenance, inspect the adjoining faces for damage and use a replacement with the correct cross section rather than choosing only by diameter.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. A flat section needs enough supported width, while a round section must fit the space provided for its deformation.

Custom dimensions

The custom shape may use a flat washer section or a round O-ring section, depending on the receiving joint.

Fit & assembly

The opening, fastener arrangement, and final closed position of the joint all influence the required dimensions.

Use & inspection

During maintenance, inspect the adjoining faces for damage and use a replacement with the correct cross section rather than choosing only by diameter.

Photos illustrate structure or material only. A flat section needs enough supported width, while a round section must fit the space provided for its deformation. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.