Rain X Glass Treatment seals the microscopic pores of glass with a super slick, non stick invisible barrier that repels rain, sleet, and snow on contact. Rain drops bead up and are blown away by the aerodynamic wind flow from driving giving you better visibility in bad weather. Rain X Glass Treatment also makes for easy removal of frost, ice, salt, mud, and bugs. This is the original Invisible Windshield Wiper. 3.5 oz. bottle.