Induction sealing is a non-contact heating method where the sealing liner does not directly touch the sealing header. The alternating magnetic field generated by the induction sealing header induces electric eddy currents in the aluminum foil layer of the induction sealing liner. This cause it to heat up and weld the sealing layer material onto the bottle mouth.

Since the induction liner does not make direct contact with the sealer, the liner can be placed inside the bottle cap and then then lock the cap tightly onto bottle neck before passing through the sealing area.

This method achieves high sealing efficiency, with some high-power induction sealers, it can seal up to 400 bottles per minute.