elastic rubber o-rings custom made silicone seals ring

Elastic rubber O-rings provide a circular sealing element within a custom joint. Their diameter and section should match the receiving groove and the space available under compression. Elasticity helps the rubber deform, but it does not make an arbitrary ring size suitable for every opening.

Check the groove and mating surfaces together. The ring needs room to change shape without being pinched or extruded into an unsupported gap. The selected compound should suit the medium, temperature, and any movement at the interface. Hardness is one part of that choice rather than a complete performance specification.

Install the ring cleanly without twist or unnecessary stretch, avoiding sharp edges during assembly. Keep it seated as the adjoining parts close and inspect for displaced sections. Evaluate the complete joint under its intended conditions. During maintenance, examine the receiving surfaces for wear or damage before replacing the ring. A new seal should restore the designed geometry, not compensate for an uneven seat or incorrect alignment elsewhere in the assembly.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Elasticity helps the rubber deform, but it does not make an arbitrary ring size suitable for every opening.

Custom dimensions

The ring needs room to change shape without being pinched or extruded into an unsupported gap.

Fit & assembly

A new seal should restore the designed geometry, not compensate for an uneven seat or incorrect alignment elsewhere in the assembly.

Use & inspection

During maintenance, examine the receiving surfaces for wear or damage before replacing the ring.

Photos illustrate structure or material only. Elasticity helps the rubber deform, but it does not make an arbitrary ring size suitable for every opening. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.