How long after car crystal coating can it be exposed to rain?
2 Answers
After car crystal coating, it takes 3 to 5 days before the car can be exposed to rain. The coating provides better protection for the vehicle's paint. A car can typically withstand about 7 crystal coating applications. Applying too many coatings can damage the paint, and each coating lasts about 2 years (though the actual lifespan is usually shorter). Car paint crystal coating is a concept introduced to differentiate it from waxing and sealing. The basic requirement for crystal coating is that the material used is SIO2 inorganic matter, which forms several structures on the surface during application, typically at the molecular nano level. Through the action of high molecular polymers, an isolation layer is formed on the surface. This layer has functions such as resisting UV rays, repelling oil, and having low surface energy for hydrophobicity, thereby protecting the paint surface.
Just helped a friend with crystal coating on his BMW two days ago, and specifically confirmed this with the technician. After coating, avoid getting the car wet immediately—the key is the curing time! The most stable coating agent I've seen still requires 24 hours before contact with water, while some cheaper products may need up to three days. Extra caution is needed for outdoor applications; if it suddenly rains, it's best to cover the car with a protective sheet. When the surface no longer feels sticky to the touch and water droplets bead up on the paint, it indicates the coating has fully formed a protective layer. Avoid automatic car washes for the first week as high-pressure water jets can severely damage the not-yet-fully-hardened coating.