Custom made round rubber gasket/rubber O-ring/washer

A round rubber gasket fits a circular joint with a contact section chosen for the mating faces. A conventional O-ring uses a different section and retaining geometry, so the two formats should remain distinct even when both appear as rings. The joint should determine the required profile rather than the nearest available outer diameter.

Define the opening, sealing width, and thickness or section diameter. Check the gap after closure and how the rubber is supported where pressure may act. Select the formulation for the actual medium, temperature, and movement of the connection.

Fit without stretching the part into an unintended seat. A flat gasket should remain flat, while a round section ring should be free of twist. During service, inspect the contact pattern alongside the surrounding hardware before replacing the seal. If the joint repeatedly pinches or extrudes rubber at one point, correct that feature instead of switching between gasket and O-ring formats in an attempt to cover an unresolved geometry problem.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Check the gap after closure and how the rubber is supported where pressure may act.

Custom dimensions

Define the opening, sealing width, and thickness or section diameter.

Fit & assembly

Fit without stretching the part into an unintended seat.

Use & inspection

During service, inspect the contact pattern alongside the surrounding hardware before replacing the seal.

Photos illustrate structure or material only. A round rubber gasket fits a circular joint with a contact section chosen for the mating faces. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.