Wholesale OEM food grade air tightness jar lid seal ring

A jar lid seal ring works between the lid and the jar rim, with the closure mechanism establishing the contact pressure. This custom silicone component can be developed around the lid groove and container opening. The selected food-contact formulation and the assembled fit should suit the intended contents and use.

Examine how the lid closes before selecting the ring section. A screw lid, clamp arrangement, or other closure may load the gasket differently. Groove depth and ring thickness need to leave the intended room for compression without preventing the lid from reaching its correct position.

The jar rim should be clean and undamaged. Food residue across the contact area can interrupt the seat even when the ring itself looks intact. Fit the ring without twisting it, and check the circumference after closing the lid. The completed container should be assessed for its intended sealing conditions; a replacement gasket alone does not establish a food-preservation process or pressure capability.

For routine care, clean the ring and its seat using the method intended for the container. If the gasket is removable, inspect the underside where residue can collect. Replace a ring that has tears, persistent deformation, or a poor fit in the original groove.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Groove depth and ring thickness need to leave the intended room for compression without preventing the lid from reaching its correct position.

Custom dimensions

Examine how the lid closes before selecting the ring section.

Fit & assembly

The selected food-contact formulation and the assembled fit should suit the intended contents and use.

Use & inspection

If the gasket is removable, inspect the underside where residue can collect.

Photos illustrate structure or material only. A jar lid seal ring works between the lid and the jar rim, with the closure mechanism establishing the contact pressure. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.