Is the car film applied to the inside or outside?

[DelHannah]

Car film is applied to the inside, except for the current modification films that change color, because applying it to the inside avoids exposure to wind and rain, slowing down aging. This prevents the car film from being subjected to excessive external interference during use, which could lead to a short lifespan, poor adhesion causing peeling or lifting edges, and other issues. If applied to the outside of the glass, it is also prone to scratches or damage from other objects. Car film is a thin layer applied to the front and rear windshields, side windows, and sunroof. This thin layer is also called solar film or heat insulation film, and its functions include blocking ultraviolet rays, reducing heat, preventing injuries from shattered glass, reducing glare, and, based on the one-way transparency of the solar film, protecting personal privacy.