Is car window film applied on the outside or inside of the glass?
2 Answers
Car window film is applied on the inside of the glass. The functions of car window film are: 1. Providing heat insulation in summer to save air conditioning energy; 2. Reducing heat loss in winter to maintain interior temperature; 3. Blocking UV rays to prolong the lifespan and quality of interior decorations by preventing direct sunlight exposure; 4. Reducing glare to ensure driving safety and comfort. Post-installation precautions include: 1. Avoiding window operation for 3 days; 2. Not cleaning the film or using defogger heating wires for one week; 3. Not using fingernails or sharp objects to peel the edges to prevent dirt ingress; 4. Avoiding suction cup items on the film for 1-2 weeks; 5. Seeking professional assistance immediately for bubbles, displacement, or visual obstructions to ensure driving safety.
I remember when I first applied a car film, I was particularly confused about whether to apply it on the outside or inside. Later, after researching, I learned that it should always be applied on the inside. If applied on the outside, exposure to wind and rain would cause the film to bubble or scratch quickly, making it less durable. Applying it on the inside avoids such damage and better serves its functions of heat insulation and privacy. For example, with sunshade films, applying them on the inside enhances UV filtration and prevents damage from external impacts. Personally, I’ve applied mirror films twice, both times on the inside, avoiding glare issues at night. Friends who applied it incorrectly had to redo it soon after, wasting money and effort. I recommend checking the instructions for proper orientation when buying film and opting for professional installation to ensure a bubble-free application. Now that the weather is hot, applying a high-quality film on the inside can significantly reduce AC load and extend its lifespan.
