Thermoset sealant film

A thermoset sealant film, comprising:

• an epoxy;
• and
• a hardener integrated with the epoxy and remaining physically distinct from the epoxy in a formed state of the thermoset sealant film, the hardener is formed as a hardener film and the epoxy is formed as an epoxy film, the hardener film is attached to the epoxy film to form the thermoset sealant film in the formed state, a gap is disposed between the hardener film and the epoxy film in the formed state, the thermoset sealant film enters a melting state at which the epoxy is mixable with the hardener at a melting temperature less than or equal to 100° C., the epoxy and the hardener remain in a solid state at room temperature, the hardener is mixed with the epoxy and is no longer physically distinct from the epoxy in a cured state of the thermoset sealant film, the mixture of the hardener and the epoxy exhibits thermoset qualities and cures to the cured state when the mixture is held above 100° C., the thermoset sealant film in the cured state remains in a solid phase up to an operating temperature of approximately 200° C.