Can the Window Film from 4S Stores Be Applied?

[LincolnMarie]

The window film from 4S stores should not be applied. The films used by 4S stores are cheap, unverified products purchased from the market, containing a large amount of harmful substances and offering poor light transmission. Prolonged use poses risks to both human health and safe driving. Moreover, some low-cost films fail to block UV rays and may develop bubbles after some time. Below are precautions to take after applying window film: 1. Do not roll down windows: Avoid rolling down the car windows for a week after applying the film. In most cases, it takes 5-7 days for the film to firmly adhere to the windows. During this period, minimize window movement to prevent displacement of the film, which hasn't fully bonded yet. 2. Do not wipe: Refrain from wiping the film for a week after application. Newly applied films may develop fogging, which is a normal part of the drying process. Such occurrences within a week to half a month are typical; simply wait for the fogging to disappear without wiping. 3. Avoid using sharp or rough tools: After applying the film, never use sharp or rough tools to scrape or wipe it. If carelessly done, such actions can significantly reduce the film's light transmittance.