Armor All 18 oz. Extreme Shield Ceramic Glass Cleaner,. Features hydrophobic Si02-based technology to repel water, clean and protect, leaving behind an invisible barrier that helps keep exterior glass clean, longer. Extreme water beading formulation repels water for improved visibility and streak-free clarity. Helps prevent snow, ice, sleet, and road spray from sticking to the glass. Fast, easy-to-use multidirectional aerosol spray with uniform coverage. For use on exterior auto glass.