Rearview mirror waterproof films are effective. Depending on the material, a rearview mirror waterproof film can last from six months to a year, after which it needs to be replaced. Principle of waterproof films: Due to their working mechanism, rearview mirrors require multiple layers of reflective coating on their surface, making the lens prone to stains that can degrade the reflective coating's effectiveness. The waterproof film acts as an additional top layer on the rearview mirror's surface, featuring strong water and oil resistance. Its key characteristic is that the film is extremely thin, ensuring it does not affect the mirror's optical performance while providing resistance to oil and water. Function of waterproof films: After applying a waterproof film, the rearview mirror maintains clear visibility during rainy conditions, offering a better view of the environment behind the vehicle. It quickly sheds water droplets and provides excellent resistance to dirt on dusty roads. Within its effective period, the film keeps the mirror clean. Therefore, if the vehicle lacks a rearview mirror drying function, using such a waterproof film is highly effective. This eliminates the need to wipe the mirror dry after every rain, avoiding the awkward scenario of having to step out to clean the mirror before driving. Lifespan of waterproof films: As the waterproof film continuously interacts with external elements, its surface gradually loses effectiveness, typically lasting six months to a year. Replacing it ensures better clarity, whereas delaying replacement can result in worse performance than not having a film at all, potentially impairing the mirror's original reflective function.
