Induction sealers are used to provide tamper evidence on sealed products, prevent product leaks and provide long-lasting freshness to products.  Food grade products and pharmaceutical companies regularly use induction sealers for these reasons.

An induction sealer uses an induction current to provide a hermetically sealed container.  Typically, the container is filled and capped.  The cap will include a liner with sealing material.  As the container passes through the induction sealer, a coil induces a current through the cap and heats the liner, melting the sealing material.  The cap itself provides the pressure necessary to keep the liner on the container.  As the sealing layer and material cools, the metal or foil liner adheres to the container, providing the required seal.