Dramatically improves wet weather driving visibility. Apply to exterior glass. Repels rain, sleet and snow. 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 tar lengths of extra stopping distance. Remember: Always use your windshield wipers as necessary. For exterior use only: Automotive glass and windshields, exterior side and rear windows, fog lights and headlights. Important: Do nowise on plastics unless pre-approved by the manufacturer of the plastic to be treated. Do not use on or allow product to contact painted surfaces, non-clear surfaces treated with anti-reflective, scratch resistant, or other coatings. Made in the USA.