The Harm of Rain Repellent to Glass?
4 Answers
No harm. Here is the relevant introduction: The function of rain repellent is to form a nano-film on the glass, which has specific water-repellent properties and can effectively prevent the formation of a water film that causes blurred vision. Generally, there are no side effects. Rain repellent has the following advantages: 1. Protective performance: It not only provides 100% anti-fog effect on car glass but also prevents aging and oxidation. 2. Environmental performance: Its material is an eco-friendly product, non-toxic, odorless, non-corrosive, and highly concentrated, requiring only 2 milliliters per square meter. 3. Cleaning performance: It can clean stains on the glass surface, making the glass more transparent and brighter. 4. Anti-freezing performance: It can significantly lower the freezing point of liquids, thereby providing an anti-freezing effect and quickly dissolving frost.
As someone who frequently deals with car detailing, I'd like to discuss the potential drawbacks of rain repellents. While they allow rainwater to slide off quickly, if the product contains impure ingredients or is improperly applied, the glass surface may become corroded, developing fine scratches or a hazy layer that affects nighttime visibility. Over time, the glass's transparency diminishes, and wiper operation may leave annoying streaks. What concerns me more is that some cheap rain repellents contain acidic substances that can erode the glass's outer protective coating, especially accelerating aging under high temperatures or intense sunlight. I recommend regularly cleaning the glass and choosing high-quality products, such as silicone- or fluorine-based rain repellents, to minimize these risks.
Having driven for many years myself, I've tried several rain repellents and found they're not 100% safe for glass. Once after application, a thin haze formed on the windshield, making visibility blurry during rain and almost causing me to miss a road sign. Worse still, the residual film left the windshield perpetually looking greasy, with wiper blades leaving streak marks that made driving even more stressful. Over time, fine scratches appeared on the glass, likely from uneven spray application or excessive force. I believe these products should be used sparingly or only reputable brands chosen—otherwise, they create more problems than they solve.
Hey, when I'm out playing cars with my friends, we always use various rain repellents, but I have to remind everyone that they can damage the glass. After applying it, the rain does slide off faster, but the glass tends to accumulate dust and turn yellow, which affects its appearance; sometimes if it's applied unevenly, headlights can cause glare, which is really annoying. What's even more frustrating is that low-quality sprays can make the glass surface rough, and after a few uses, the wipers start squeaking, which sounds terrible. After trying it out, I switched to natural wax-based rain repellents, which are less harmful.
