Induction Sealing creates a hermetic seal by passing a capped bottle under the induction sealer in a non-contact process. The systems sealing head produces an electromagnetic field that heats up the foil liner inside the cap. he hot foil in turn melts the polymer coating on the inner- seal.What is the temperature of Induction sealing ? The temperature of the electromagnetic induction heating is generally at 200 Celsius. After the product is taken out of the sealing machine for 30 seconds, infrared thermal imaging is conducted, and the temperature of the aluminum foil is about 80 Celsius when the thermal imaging image is obtained.