Make company vehicles safer with EnduroShield Automotive Glass Rain Repellent. One application will repel rain and improve visibility for up to one year or 12,500 miles, the maker says. Applied with a soft cloth, the non-stick, invisible coating causes rainwater to bead; reduces adhesion of grime and bugs; and eases snow and ice removal. The company also offers treatments for shower doors and other materials, making cleaning a breeze. The Automotive kit costs $10 at Home Depot. Shower-door treatments cost $20.