Custom waterproof silicone rubber flat sealing ring gasket

A flat sealing ring gasket relies on even contact across its working faces. In a silicone waterproofing arrangement, a small folded edge or trapped particle can interrupt that contact even when the rest of the ring looks compressed. The housing and gasket should be evaluated together under the intended water exposure.

The inner and outer dimensions, thickness and material formulation can be customized. Choose a ring that stays supported during closure rather than one that must be stretched across the joint. If the housing closes with a sliding or turning motion, assess whether that movement drags the gasket from its seat.

Before assembly, inspect both faces of the ring and clean the mating surfaces. Check the perimeter after closure for uneven projection, then assess the finished joint using representative operating conditions. During maintenance, look for a repeated crease or extrusion mark in the same location. That may point to a local housing gap or closing sequence issue. Replacing the ring alone is unlikely to address an unchanged cause of folding.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. If the housing closes with a sliding or turning motion, assess whether that movement drags the gasket from its seat.

Custom dimensions

The inner and outer dimensions, thickness and material formulation can be customized.

Fit & assembly

Choose a ring that stays supported during closure rather than one that must be stretched across the joint.

Use & inspection

Before assembly, inspect both faces of the ring and clean the mating surfaces.

Photos illustrate structure or material only. In a silicone waterproofing arrangement, a small folded edge or trapped particle can interrupt that contact even when the rest of the ring looks compressed. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.