Apply to exterior glass. Repels rain and reduces the adhesion of sleet and snow. Improves wet weather driving visibility. Lets You See Clearly: Rain-X is invisible and non-reflective. The transparent polymer coating causes the rain, sleet and snow to bead-up and roll off glass surfaces. Rain-X also reduces the adhesion and build up of frost, salt, mud, insects and road grime to improve wet-weather visibility and driving comfort. Made in USA.