Custom made molded rubber seal gasket/silicone rubber washer

A rubber seal gasket has two boundaries that can be obscured differently during assembly. The outside edge may remain visible while the inner edge disappears beneath a flange or cover. Checking only the exposed perimeter can therefore miss rubber displaced into the passage.

Plan a way to verify the inner opening before it becomes concealed. Align the gasket with its intended locating features and observe how the adjoining part approaches it. A sideways movement during closure can carry a narrow inner section with the cover even while the outer outline remains apparently centered.

Custom silicone geometry can match the required opening and any nearby clearance features. The selected material should correspond to the actual contents and service conditions. During disassembly, inspect the bore-side contact for folding or local abrasion that may not show on the external edge. If the same section is repeatedly disturbed, review the closure path and internal clearances. Replacing the seal without addressing that movement may leave the next gasket displaced in exactly the same hidden location.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. A sideways movement during closure can carry a narrow inner section with the cover even while the outer outline remains apparently centered.

Custom dimensions

Custom silicone geometry can match the required opening and any nearby clearance features.

Fit & assembly

Align the gasket with its intended locating features and observe how the adjoining part approaches it.

Use & inspection

During disassembly, inspect the bore-side contact for folding or local abrasion that may not show on the external edge.

Photos illustrate structure or material only. The outside edge may remain visible while the inner edge disappears beneath a flange or cover. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.