The thermal insulation film in car film can reflect and absorb some of the infrared rays in sunlight, significantly reducing the temperature inside the car and improving driving comfort. In the hot summer, vehicles coated with film can reduce the frequency of air conditioning usage, thereby achieving energy-saving effects. Dark or highly reflective car films can to some extent block the interior of the car, providing better privacy protection for both owners and passengers. This is particularly important for business vehicles or vehicles that need to store valuable items.