Custom rubber silicone washer/ food grade silicone gaskets

A custom silicone washer provides an annular rubber interface whose dimensions should match its mating parts. For a food contact gasket application, the formulation and joint geometry need to be selected around the contents, processing conditions, and cleaning method. The washer's bore, outer edge, and thickness determine where it can be supported.

Establish whether the part acts primarily as a spacer, contact layer, or seal within the assembly. A sealing role requires a defined contact path and appropriate compression from the surrounding parts. The rubber should not be pinched into an unintended gap or stretched around a feature that differs from its intended bore.

Keep the mating faces clean before installation and consider how the joint will be opened for cleaning. Residue beneath an edge may remain hidden when the assembly looks clean from the outside. Inspect the washer after disassembly for damage and changes in shape. Replacement should preserve the exact formulation and dimensions used for the food contact location, rather than substituting a similar looking ring selected only by its outside diameter.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The rubber should not be pinched into an unintended gap or stretched around a feature that differs from its intended bore.

Custom dimensions

The washer's bore, outer edge, and thickness determine where it can be supported.

Fit & assembly

Keep the mating faces clean before installation and consider how the joint will be opened for cleaning.

Use & inspection

Residue beneath an edge may remain hidden when the assembly looks clean from the outside.

Photos illustrate structure or material only. A sealing role requires a defined contact path and appropriate compression from the surrounding parts. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.