RAIN-X Washer Fluid Additive enhances your vehicle’s windshield washer system by adding advanced water-repellent technology. When mixed with regular washer fluid, it helps rainwater bead up and roll off the windshield, improving visibility during wet weather conditions. This concentrated formula is easy to use—simply add it to your washer fluid reservoir for long-lasting protection against rain, sleet, and snow. Safe for all vehicles and washer systems, it helps maintain a clearer, safer windshield for confident driving.