Custom molded rectangular silicone rubber sealing gasket

A rectangular silicone rubber sealing gasket needs its corner radii and straight sections matched to the receiving seat. Overall length and width do not fully define how the ring will lie. A corner that is too tight or too broad can pull adjacent sections away from their intended contact.

Custom dimensions, hardness and color allow the silicone profile to follow the assembly. Define the section thickness and available compression with the actual mating surfaces. The selected formulation should suit the medium, temperature and cleaning process.

During fitting, position the gasket without stretching the long sides to force the corners into place. Check the entire perimeter before closing the joint. Follow the intended fastening sequence and inspect for a section dragged outside its seat. Evaluate the complete seal under representative operating conditions. During maintenance, compare corner marks with those along the straight sections. Uneven compression may indicate a local housing condition or closure sequence issue that should be corrected before changing only gasket thickness.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. During fitting, position the gasket without stretching the long sides to force the corners into place.

Custom dimensions

Overall length and width do not fully define how the ring will lie.

Fit & assembly

Follow the intended fastening sequence and inspect for a section dragged outside its seat.

Use & inspection

The selected formulation should suit the medium, temperature and cleaning process.

Photos illustrate structure or material only. A corner that is too tight or too broad can pull adjacent sections away from their intended contact. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.