Custom made EPDM/ SBR/ HNBR waterproof washer

A custom waterproof washer needs a suitable rubber compound and a matched joint geometry. EPDM, SBR and HNBR are material choices for different conditions, so select the actual formulation around the medium, temperature and duration of exposure rather than treating the names as equivalent options.

Compare the center opening, outside contact area and available compression space with the mating components. Rubber washers can be cut or molded in appropriate forms, with the selected shape intended to remain supported when the joint closes.

Clean the seat and position the washer flat before assembly. Keep the inside edge from folding into the passage and inspect for rubber displaced beyond its supporting face. Evaluate the completed joint for the intended sealing duty. During servicing, follow the system's release procedure and examine both washer faces for changes or damage. Correct an uneven seat, incompatible exposure or trapped debris before replacement rather than relying on increased fastening force to compensate for a contact that is not properly established.

Material options

EPDM / HNBR / SBR. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Compare the center opening, outside contact area and available compression space with the mating components.

Custom dimensions

Rubber washers can be cut or molded in appropriate forms, with the selected shape intended to remain supported when the joint closes.

Fit & assembly

Clean the seat and position the washer flat before assembly.

Use & inspection

During servicing, follow the system's release procedure and examine both washer faces for changes or damage.

Photos illustrate structure or material only. A custom waterproof washer needs a suitable rubber compound and a matched joint geometry. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.