The car windshield film should be applied to the inside of the glass, not the outside. This is the standard practice in the automotive industry for several key reasons.
Why Inside?
- Safety & Security: The primary purpose of a windshield film is to act as a safety layer. In case of an impact, the film holds the glass together, preventing shards from flying into the car and injuring passengers. If applied outside, it would fail in this critical function.
- Durabilidade: The film is protected from the elements when applied inside. Exposure to rain, sunlight, and debris (like from windshield wipers) on the outside would cause it to fade, peel, or degrade much faster, significantly shortening its lifespan.
- Adhesion & Performance: The adhesive is designed to bond with the interior glass surface, ensuring a strong, long-lasting hold. External application would lead to poor adhesion, bubbling, or peeling over time.
Common Misconception
You might see installers working on the outside of the glass. This is typically just for measuring, cutting, and shaping the film to fit perfectly before it’s applied to the inside.
Final Verdict
Always insist on having your windshield film applied to the inside. It’s the only way to ensure you get the full benefits of safety, durability, and performance that the film is designed to provide.
