Waterproof silicone rubber gasket/rubber sealing washer

A rubber sealing washer provides a custom annular interface for a joint that requires a rubber seal. Silicone and other compounds can be selected according to the water exposure, contacting materials and operating conditions. The washer dimensions define the area covered and the space occupied between the mating surfaces.

Trace the intended sealing path around the opening. A continuous ring requires continuous support and contact at the relevant faces. A groove, damaged rim or intersecting feature can interrupt that path even if the washer's diameters match. Check thickness with the joint at its designed closed position so the available space and rubber compression are considered together.

Fit the washer flat on a clean face and keep it centered as the joint closes. Avoid trapping its edge in a thread or drawing it partly into an unsupported opening. Evaluate the finished connection under the actual water conditions it must meet. During maintenance, inspect both the ring and the mating faces; replacing the rubber alone will not correct a cut or distorted surface beneath it.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Check thickness with the joint at its designed closed position so the available space and rubber compression are considered together.

Custom dimensions

A groove, damaged rim or intersecting feature can interrupt that path even if the washer's diameters match.

Fit & assembly

Fit the washer flat on a clean face and keep it centered as the joint closes.

Use & inspection

During maintenance, inspect both the ring and the mating faces; replacing the rubber alone will not correct a cut or distorted surface beneath it.

Photos illustrate structure or material only. A continuous ring requires continuous support and contact at the relevant faces. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.