A vented seal is essentially a foam gasket or induction liner with a vent hole punched into it, onto which a waterproof breathable membrane is welded.

Certain products generate gases after production and packaging, such as some fertilizers, detergents, or chemical products. If the excess gas inside the bottle is not promptly released, the bottle may deform or even burst. Moreover, the formulation of these products is typically complex, and leakage could lead to environmental pollution or personal injury.

Using a vented seal can help reduce or prevent such incidents from occurring.