High quality waterproof silicone rubber bottle cap seal o ring

A silicone rubber bottle cap seal o ring should remain in its intended seat while the cap is applied. The closing movement can drag a ring against the neck or pull an edge toward the opening if the profile or available clearance is unsuitable.

ETOL offers custom size, color and material construction. Compare the cap seat with the actual bottle neck and select the formulation for the contents and cleaning conditions. Keep the ring's section matched to the designed assembled space.

Place the seal without twisting and apply the cap by its intended method. Inspect the accessible perimeter and evaluate the completed closure for the required moisture-exclusion function. During removal, check whether the ring has stayed in its seat or followed the cap into a distorted position. Clean away residue before refitting and replace a cut or permanently stretched part. If a different bottle or cap is introduced, reassess the whole interface rather than assuming the same nominal closure size guarantees the original ring will contact correctly.

Material options

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

Hardness selection

Silicone: 20–80 Shore A. The closing movement can drag a ring against the neck or pull an edge toward the opening if the profile or available clearance is unsuitable.

Custom dimensions

During removal, check whether the ring has stayed in its seat or followed the cap into a distorted position.

Fit & assembly

A silicone rubber bottle cap seal o ring should remain in its intended seat while the cap is applied.

Use & inspection

Clean away residue before refitting and replace a cut or permanently stretched part.

Photos illustrate structure or material only. The closing movement can drag a ring against the neck or pull an edge toward the opening if the profile or available clearance is unsuitable. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.