Is the window film applied on the inside or outside?
2 Answers
Window film is applied on the inside, including the front windshield film, rear windshield film, side window film, and quarter window film. The reasons are: 1. It is not exposed to wind and rain, slowing down the aging process and extending its service life; 2. The film is less susceptible to external interference during use, avoiding scratches and damage. The functions of window film are: 1. Heat insulation and sun protection to reduce the temperature inside the car; 2. UV protection to reduce the aging of car interiors; 3. Preventing injuries to passengers caused by accidental glass breakage; 4. Creating a private space; 5. Reducing air conditioning consumption; 6. Enhancing aesthetics; 7. Reducing glare.
Having driven for over a decade, I know car window films must be applied on the inner side. If installed outside, exposure to wind, rain, and dust abrasion causes bubbling or scratches, drastically reducing the film's lifespan—lasting barely a year before replacement. Inner application is different: the glass acts as a protective layer, shielding it from weather, ensuring it remains pristine for at least 3-5 years. The installation process is meticulous—first cleaning the glass with alcohol to remove grease, then professionals use specialized squeegees to smooth it bubble-free. I once tried DIY and ended up ruining the film, wasting money. Post-installation benefits are clear: parked cars stay cooler in summer, AC cools faster; enhanced privacy obscures interior views, easing driving stress. Safety-wise, if windows shatter, fragments adhere to the film, preventing injury. Choose films with over 70% light transmission to avoid nighttime visibility issues.
