Should the Front Windshield Film Be Applied on the Inside or Outside?
2 Answers
Glass film should be applied on the inside of the car windshield. Below are the specific reasons and the benefits of applying car window film: Reasons for applying film on the inside: Applying the film on the inside makes it less prone to scratches and also helps protect the occupants of the vehicle. Additionally, applying it on the inside extends its lifespan, as the film is less exposed to external disturbances. It won’t be subjected to harsh weather conditions, ensuring a more secure adhesion without issues like peeling edges. Benefits of applying film: Heat and UV protection: The film effectively blocks a significant amount of heat generated by infrared rays. Medium and long-wave ultraviolet rays can penetrate thick glass, but applying heat-insulating film can block most UV rays, preventing skin damage and reducing the aging of car interiors. Safety and explosion-proof: The base layer of the film is made of polyester, which has excellent tear and puncture resistance. Combined with the adhesive layer, the film enhances the strength of the glass, preventing injuries from accidental glass breakage to the driver and passengers.
I saw a friend asking where to apply the front windshield film, and I happened to have researched this when I worked at a car dealership. This film must absolutely be applied to the inside of the windshield! Applying it on the outside is completely out of the question. The film material itself is very delicate—if applied outside, it would get scratched by the wipers in no time, and any small pebble on the road could easily leave a dent. Moreover, the outer surface of the glass is curved, making it impossible for the film to adhere perfectly, inevitably causing bubbles at the edges. The biggest hassle is the water sprayed during application—if it seeps into the wiper controller, it will definitely cause damage. Professional installers always work on the inside using a squeegee, heating and pressing to conform to the curvature, and finally sealing the window edges. If you see a shop applying film to the outside of your glass, run away immediately.
