July 6, 2026, 10:16 a.m. CT Window tint is a thin film that is applied to windows, typically made of polyester, in order to reduce the amount of light and heat that enters a space. Window tint can also provide privacy and enhance aesthetics, and it's commonly used on vehicle windows. When it comes to the limit for vehicle window tint, there are no federal restrictions regarding tint darkness, however, there are state tint laws. How dark can car window tint be in Louisiana?