Rust-Oleum NeverWet rain repellent is a durable, hydrophobic coating that helps increase driving visibility for safe driving in poor weather conditions. This water repellent for glass is intended to dry crystal clear. Rust-Oleum rain repellent has the ability to last up to two times longer than other products in wiper blade abrasion testing. With a haze-free formula, this rain repellent for cars is easy to use. The water repellent is ideal for use on automotive and residential glass. Use this spray for glass that repels rain, mud, and dirt. Clean the glass surfaces with NeverWet Glass Cleaner before application of this rain repellent spray for best results.