Food grade elastic silicone o ring flat rubber sealing o ring

A flat rubber sealing o ring should rest evenly within its intended contact path. Its flexible section can wrinkle if one part is stretched to reach the seat or if a mating cover drags it sideways during closure.

ETOL offers custom size, color and material construction. Select the formulation for the intended food-contact and processing conditions, and compare the ring profile with the actual assembled space. A flat section should be assessed in the joint that holds it rather than treated like every other circular seal.

Clean the seat and lay the ring without tension. Bring the mating surface into position carefully, watching for an inner edge folding toward the opening. Evaluate the required function on the completed closure. During removal, keep sharp tools away from the thin contact region and inspect both faces for damage. If the ring has developed a permanent fold, replace it and inspect the closing path that caused the wrinkle rather than flattening the affected section by hand and returning it unchanged to the assembly.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Its flexible section can wrinkle if one part is stretched to reach the seat or if a mating cover drags it sideways during closure.

Custom dimensions

Bring the mating surface into position carefully, watching for an inner edge folding toward the opening.

Fit & assembly

Clean the seat and lay the ring without tension.

Use & inspection

During removal, keep sharp tools away from the thin contact region and inspect both faces for damage.

Photos illustrate structure or material only. A flat rubber sealing o ring should rest evenly within its intended contact path. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.