What is a cap seal?
A seal is a thin film of aluminium, plastic or compound materials positioned on the opening of containers such as vials, bottles, jars, pill bottles or jugs in order to (depending on the type of seal):
provide a hermetic, watertight seal
provide a guarantee that the container has not been tampered with and has never been opened.
protect the product against light, oxygen, moisture, germs and odours
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