Custom molded rubber silicone washer/rubber seal with special-shape

A rubber seal with special-shape geometry can follow an interface that is not adequately served by a standard ring. Custom molding allows the outside outline, internal openings, and locating details to be developed together. The result should fit the intended seat without trimming the component during installation.

Use the assembly's asymmetry to establish orientation. A notch, offset opening, or unequal side length can help identify the correct position, but each feature still needs to match the mating parts. Narrow sections between openings require particular care because they can be pulled out of place while the rest of the seal appears aligned.

Select the compound and thickness for the contact conditions and closing space. Place the seal on clean surfaces and confirm the full outline before lowering the mating component. Close the assembly using its designed sequence so that the rubber remains supported. During servicing, inspect the less visible corners and inner edges for cuts or deformation. Keep replacement seals protected from folding so that their shaped sections lie naturally in the seat.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Select the compound and thickness for the contact conditions and closing space.

Custom dimensions

Custom molding allows the outside outline, internal openings, and locating details to be developed together.

Fit & assembly

The result should fit the intended seat without trimming the component during installation.

Use & inspection

During servicing, inspect the less visible corners and inner edges for cuts or deformation.

Photos illustrate structure or material only. A rubber seal with special-shape geometry can follow an interface that is not adequately served by a standard ring. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.