Customized waterproof rubber thin washer/silicone rubber gaskets

A thin washer used in a silicone rubber gasket arrangement needs careful seating because its edge can fold or shift as the joint closes. The limited thickness should suit the available space, but it also means the mating surfaces and locating arrangement are important to achieving the intended contact.

Choose the inner and outer dimensions for a fully supported ring. The washer should not be stretched over an incompatible feature merely to hold it during assembly. Check for surface irregularities that the selected thin section cannot accommodate appropriately, rather than assuming any flexible ring will fill the gap.

Position the washer flat and watch its edge as the components meet. Evaluate waterproof performance on the complete joint under the specified conditions. After disassembly, inspect for a folded section, cuts, and an uneven contact pattern that may reveal displacement during closure. A damaged thin ring should not be flattened by hand and reused without assessing its condition, since the original working profile may not recover after pinching.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Check for surface irregularities that the selected thin section cannot accommodate appropriately, rather than assuming any flexible ring will fill the gap.

Custom dimensions

The limited thickness should suit the available space, but it also means the mating surfaces and locating arrangement are important to achieving the intended contact.

Fit & assembly

A thin washer used in a silicone rubber gasket arrangement needs careful seating because its edge can fold or shift as the joint closes.

Use & inspection

After disassembly, inspect for a folded section, cuts, and an uneven contact pattern that may reveal displacement during closure.

Photos illustrate structure or material only. The limited thickness should suit the available space, but it also means the mating surfaces and locating arrangement are important to achieving the intended contact. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.