Is the Film Applied to the Inside or Outside of the Glass?

[AdalineMarie]

Film is applied to the inside of the glass. Below is relevant information about car window film: 1. Reason for applying inside: Car window film should be applied to the inner side of the car glass because it won't be exposed to wind and rain when applied inside, thus aging more slowly and extending its service life. Additionally, during use, the film won't be subject to significant external interference, won't get scratched or damaged, won't endure wind and rain, and the adhesion will be more secure without issues like peeling edges. 2. Function of the film: Blocks UV rays. Medium and long waves in ultraviolet light can penetrate thick glass, but applying heat-insulating film can block most UV rays, preventing skin damage and reducing the aging of car interiors.