Round flat silicone rubber gaskets and seals

Round flat silicone rubber gaskets provide a custom interface between mating faces. Their circular outline can be sized to follow the supported sealing area, with the thickness selected for the assembly's closing gap. The component should lie evenly before compression is applied.

Check the relationship between the center opening and the outside edge. The useful contact width is the area supported by both mating parts, not necessarily the full visible width of the gasket. Nearby steps or raised features can reduce that support even when the overall diameters appear correct.

Select the silicone formulation for the contents, temperature, and cleaning conditions of the joint. Fit the gasket without stretching it around a feature that is larger than its intended opening. Bring the mating faces together in alignment so that the ring does not slide sideways. During maintenance, examine both faces for permanent uneven compression and clean deposits from the seat. Match the original thickness and compound when replacing the gasket, preserving the designed closing relationship.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Fit the gasket without stretching it around a feature that is larger than its intended opening.

Custom dimensions

The useful contact width is the area supported by both mating parts, not necessarily the full visible width of the gasket.

Fit & assembly

Check the relationship between the center opening and the outside edge.

Use & inspection

During maintenance, examine both faces for permanent uneven compression and clean deposits from the seat.

Photos illustrate structure or material only. The useful contact width is the area supported by both mating parts, not necessarily the full visible width of the gasket. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.