Custom made silicone sealing gasket/round rubber washer

A round rubber washer forms an annular contact between mating components. Centering matters because the ring needs to remain supported around its circumference while leaving the intended passage clear. A washer displaced slightly during closure can intrude into the opening on one side and lose support on the other.

Choose the inner and outer diameters with the actual seating faces in view. The thickness should suit the available space and intended compression. If a fastener or central feature helps locate the ring, check that it does not stretch or cut the inner edge during assembly.

Before tightening, make sure the washer lies flat and remains in position as the components meet. Assess any sealing requirement in the complete connection using the selected formulation and intended medium. On disassembly, inspect the compression pattern for evidence of off-center seating or local extrusion. A repeated uneven pattern can reveal a locating or support issue that is more useful to address than simply replacing the ring with another of the same outside diameter.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. If a fastener or central feature helps locate the ring, check that it does not stretch or cut the inner edge during assembly.

Custom dimensions

A washer displaced slightly during closure can intrude into the opening on one side and lose support on the other.

Fit & assembly

Centering matters because the ring needs to remain supported around its circumference while leaving the intended passage clear.

Use & inspection

On disassembly, inspect the compression pattern for evidence of off-center seating or local extrusion.

Photos illustrate structure or material only. The thickness should suit the available space and intended compression. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.