Can residential window film be applied to car windows?

No, it cannot. While some people might consider removing residential window film and using it on car windows when the car window film is damaged or ineffective, this is a risky practice. The reason is that these two types of glass films have different designs and performance characteristics. For example, when it comes to light transmittance, automotive window film usually has better light transmittance, primarily for the sake of driving safety. If you use residential window film, it may increase the risk while driving. Moreover, many residential window films are privacy films, and it's not allowed to use privacy films on car windows. Therefore, it's not recommended to apply residential window film to car windows.