Custom made silicone rectangular rubber seal gaskets

Rectangular rubber seal gaskets provide a custom molded interface around a shaped opening. The length, width, corner radii, and thickness should follow the receiving joint. The corners need the same attention as the straight sections because uneven seating there can interrupt the intended contact.

Check the locating features and fastening arrangement. The gasket should sit without stretching to reach the corners or bunching where the outline changes direction. The mating faces need enough support to apply the intended compression around the whole perimeter.

Select the silicone compound for the actual medium, temperature, and cleaning exposure. Place the gasket cleanly and inspect its position as the joint closes. Avoid trapping an edge near a fastener or using extra tightening to force an unsuitable section into the gap. Evaluate the complete assembly under its operating conditions. During maintenance, inspect the corners and mating faces for damage, then replace the gasket with the full matching outline and thickness rather than choosing only by overall length and width.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Avoid trapping an edge near a fastener or using extra tightening to force an unsuitable section into the gap.

Custom dimensions

The length, width, corner radii, and thickness should follow the receiving joint.

Fit & assembly

Place the gasket cleanly and inspect its position as the joint closes.

Use & inspection

During maintenance, inspect the corners and mating faces for damage, then replace the gasket with the full matching outline and thickness rather than choosing only by overall length and width.

Photos illustrate structure or material only. The length, width, corner radii, and thickness should follow the receiving joint. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.