NAR Room-temperature Self-Healing PPF also has the same function and characteristics as Heat Self-healing. However, it is capable of operating at room temperature, which is lower than that of heated air or lit conditions. With our advanced top coating, the films can?self-heal?at?ambient temperatures?or with heat. The repair can be completed in approximately one hour if the indoor temperature is around twenty degrees. Moreover, the outside temperature can hasten the healing process.