Should You Wash Your Car Before Applying Window Tint?
2 Answers
You should wash your car before applying window tint. If the car body is not clean, bumps will appear after the film is applied, which not only affects the appearance of the car but also makes the raised areas prone to damage. Car window tinting involves applying a thin film-like material to the front and rear windshields, side windows, and sunroof. This film is also known as solar film or heat-insulating film. The main functions of heat-insulating film are to block ultraviolet rays, reduce heat, prevent injuries caused by shattered glass, reduce glare, and, thanks to the one-way transparency of the film, protect personal privacy. Additionally, it can minimize damage to interior items and passengers caused by UV exposure. Through physical reflection, it lowers the temperature inside the car, reduces the use of air conditioning, thereby decreasing fuel consumption and saving costs.
You asked a great question. I often help customers with film installation at the shop, so the first step is always car washing. New cars may look shiny on the surface, but they can still have residual dust, grease, or fingerprints from the factory. If you apply the film without thorough cleaning, it’s prone to bubbles or poor adhesion, leading to peeling or reduced transparency over time. I’ve seen many customers skip washing to save time, only to come back repeatedly for rework—wasting money and causing hassle. The correct procedure is to first clean the car thoroughly with pH-neutral car shampoo, especially the windows and hood where the film will be applied, then use alcohol or a professional degreaser to remove oils, and finally ensure the surface is completely dry. Applying film is like sticking a sticker—adhesion depends heavily on surface purity, so washing is the essential foundation. Plus, a new car deserves that extra care—don’t let dirt ruin a good film.
