Is the windshield film applied on the inside or outside?
2 Answers
The windshield film is applied on the inside for the following reasons: 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 windshield film include: 1. Heat insulation and sun protection to reduce the interior temperature; 2. UV protection to reduce aging of the car's interior; 3. Preventing injuries to passengers in case of accidental glass breakage; 4. Creating a private space; 5. Reducing air conditioning consumption; 6. Enhancing aesthetics; 7. Reducing glare. Precautions after applying car film: 1. Avoid rolling down the windows for 3 days; 2. Do not clean the heat-insulating film or turn on the defogging heating wires for a week; 3. Do not use nails or sharp objects to pry the edges of the film to prevent dirt from entering; 4. Avoid attaching suction cup items to the film for 1 to 2 weeks; 5. If bubbles, displacement, or blurred vision occur on the film surface, seek professional assistance promptly to ensure driving safety.
I remember a few years ago when I was considering applying a front windshield film myself, I consulted a professional shop. The technician immediately emphasized that the film should be applied on the inside, not the outside. He explained that since the front windshield is exposed to wind and rain, and the wipers constantly rub against it, applying the film on the outside could lead to bubbling and scratches at best, or complete peeling that compromises safety at worst. After applying the film, I noticed a significant reduction in glare while driving, especially under the summer sun—it’s much less harsh on the eyes. It also helps reduce heat buildup, saving on air conditioning. Additionally, it enhances privacy, making it harder for outsiders to see inside my car. The only thing to watch out for is choosing a high-quality film to avoid low light transmittance affecting night vision—opt for films with at least 70% light transmittance for safety. During every maintenance session, I remind myself to clean the inner glass to maintain clarity. In short, applying it on the inside is the standard practice—don’t cut corners to save a little money and risk bigger issues. Taking the time to choose the right film pays off for life.
