Is the car windshield film applied on the inside or outside?
2 Answers
The car 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 thus extending its service life; 2. The film is less subject to external interference during use, avoiding scratches and damage. The functions of the windshield film include: 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 drivers and passengers in case of accidental glass breakage; 4. Reducing air conditioning consumption; 5. Anti-glare. Precautions after applying car film are: 1. Avoid rolling down the windows within 3 days; 2. Do not clean the heat-insulating film or turn on the defogging heating wires within 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 there are bubbles, displacement, or blurred vision on the film surface, seek professional assistance immediately to avoid affecting driving safety.
I recently tried applying car window film myself and learned that it should be applied to the inside of the windshield, not the outside. The reason is simple: applying it inside avoids damage from sun exposure, rain, and scratches from debris, extending its lifespan. When I tried DIY application on the outside before, the film quickly turned yellow and bubbled, affecting visibility. Nowadays, professional installers recommend applying it inside—first cleaning the interior glass with a cleaner, then spraying solution before applying the film to ensure no bubbles, enhancing privacy and protecting the interior. Safety is crucial, and the law requires high light transmittance for windshield film to prevent glare during night driving. I believe regular checks on the film’s condition are essential to ensure clear driving visibility and avoid accidents.
