Use Meguiar?s Marine/RV Care M770 Trailer Corrosion Protectant to prevent corrosion rust and damage caused by saltwater and high-alkaline freshwater. Our polymer-based aerosol formula sprays and dries clear leaving a long-lasting protective barrier on your trailer?s metal surfaces including painted clear coated aluminum and galvanized. Quick-drying self-leveling formula helps prevent runs and drips to ensure even coverage. Safe to use near plastics and wiring and won?t harm paint wrapped surfaces or trailer wiring.