Dramatically improves wet weather driving visibility. Apply to exterior glass. Repels rain, sleet and snow. The invisible windshield wiper. Lets you see clearly. Rain-X Performance: Rain-X seals the microscopic pores of glass with a super-slick, non-stick invisible barrier that repels rain, sleet and snow on contact. Raindrops bead up and are blown away by the aerodynamic wind flow from driving; improving all-weather visibility, safety and driving comfort. The Rain-X treatment also makes for easy removal of frost, ice, salt, mud and bugs. Rain-X Safety: Better visibility means better response time. In tests conducted by a major university, response time improved up to a full second or more. At highway speeds, that is almost four car lengths of extra stopping distance. Made in USA.