Molded compressing rubber gasket/washer with high quality

A rubber gasket can have a flat washer section or a rounded ring section, and those forms require different receiving arrangements. A flat face distributes contact across its width, while a rounded section occupies a groove differently as the joint closes. Custom molding should reproduce the form the assembly was designed to use.

Before selecting a replacement, identify the seat rather than relying on the general name assigned to the old part. A shallow flat recess, a circular groove, and two unrestricted mating faces are not the same geometry. The shape of the available space determines which dimensions are needed to describe the gasket.

Keep section variants separate during assembly so a similarly sized ring is not fitted by appearance alone. Select the precise rubber for the contacted substances and service conditions. If the joint cannot reach its expected closed position, verify that the correct section was selected before adjusting the hardware. This is particularly useful where a workshop handles several washer and O-ring versions that share an outside diameter but belong to different connections.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. Set firmness for the intended cross-section: flat contact width and a rounded groove seat constrain deformation in different ways.

Custom dimensions

The shape of the available space determines which dimensions are needed to describe the gasket.

Fit & assembly

If the joint cannot reach its expected closed position, verify that the correct section was selected before adjusting the hardware.

Use & inspection

Before selecting a replacement, identify the seat rather than relying on the general name assigned to the old part.

Photos illustrate structure or material only. A flat face distributes contact across its width, while a rounded section occupies a groove differently as the joint closes. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.