Custom made waterproof rubber seal O-ring/rubber washer

A rubber seal O-ring should sit in a groove that controls its compression and supports it under the actual pressure direction. Its round section needs a different space from a flat washer, so the selected format should follow the joint design. Water resistance is assessed at the complete connection with the actual mating surfaces and exposure.

Choose the ring dimensions and compound around the operating medium, temperature, and movement. Check the installation route for threads or sharp steps that may damage the surface before the ring reaches its seat. Keep the section from being overstretched to fit an approximate groove diameter.

Position the ring untwisted on clean surfaces and inspect before closure. During maintenance, compare cuts or extruded areas with the surrounding hardware. A thicker replacement may create excessive compression without correcting a damaged groove or unsupported gap. Preserve the intended specification and address the mating feature where needed so the complete joint returns to its designed contact condition.

Material options

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

Hardness selection

Rubber: 30–90 Shore A. A rubber seal O-ring should sit in a groove that controls its compression and supports it under the actual pressure direction.

Custom dimensions

Keep the section from being overstretched to fit an approximate groove diameter.

Fit & assembly

Check the installation route for threads or sharp steps that may damage the surface before the ring reaches its seat.

Use & inspection

A thicker replacement may create excessive compression without correcting a damaged groove or unsupported gap.

Photos illustrate structure or material only. A rubber seal O-ring should sit in a groove that controls its compression and supports it under the actual pressure direction. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.