National Cycle RainZip Rain Repellent Ride safer with a windshield that stays clearer in rainy weather. RainZip is hydrophobic, meaning it repels water by beading it up and blows away with wind. Features Rain Zip is a rain repellent treatment that beads water on the windshield Once you are cruising the rain runs off the windshield so you can see through the shield It is formulated for Quantum hardcoded polycarbonate windshield but is also safe for all windshields Kit includes 3 oz. bottle of Rain Zip, application cloth, and microfiber polishing cloth