It was installed in the car ceiling for thermal insulation and soundproofing. I can't say anything about the temperature results in the car, which interests me the most, as I haven't taken measurements before and after. However, it will definitely be much better than the thin sheet metal that the car has on the roof. It is not fireproof, so I do not recommend it for the engine and generally in areas with a fire risk. It is a foam material with a thin sheet of aluminum foil on one side. Its adhesive on the other side is quite strong. Overall, a decent product for my use, which does not have excessive demands. Its price could have been lower.