Custom made round flat food grade silicone gasket for jar lids

A round flat food grade silicone gasket for a jar lid needs a width matched to the lid's sealing land. The ring should cover the intended contact without extending unnecessarily into the opening or beyond its support. Thickness should be selected with the lid's closing movement and available compression.

Custom dimensions, hardness and color allow the seal to match the jar. Choose the silicone formulation for the actual contents, contact temperature and cleaning process. Evaluate the complete lid and jar combination using representative components.

Before closure, place the ring flat and check that it has not been stretched unevenly around the seat. Inspect the perimeter after closing for an edge that has been dragged outward. During cleaning, examine both faces and remove residue from the retaining recess. If one side shows a stronger contact imprint, review lid alignment and support across the ring. A thicker replacement should not be used automatically to overcome uneven closing, since it may increase distortion without correcting the underlying geometry.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. Thickness should be selected with the lid's closing movement and available compression.

Custom dimensions

A round flat food grade silicone gasket for a jar lid needs a width matched to the lid's sealing land.

Fit & assembly

Before closure, place the ring flat and check that it has not been stretched unevenly around the seat.

Use & inspection

During cleaning, examine both faces and remove residue from the retaining recess.

Photos illustrate structure or material only. The ring should cover the intended contact without extending unnecessarily into the opening or beyond its support. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.