FEATURES Can be sprayed or brushed Prevents rust from recurring by protecting metal from further exposure to moisture Designed for application directly on rusted or seasoned metal surfaces Dries to an incredible rock-hard, non-porous finish that won\'t chip, crack, or peel (dries faster in humid conditions) - totally resistant to most acid, petrol  and road salt. UV light sensitive (must be topcoated for prolonged exposure to sunlight)   APPLICATIONS AUTOMOTIVE: suspension - chassis - doors -  trunk areas - engine & fuel tanks - rusty frames - floor pans - corroded battery tray. INDUSTRIAL: heavy equipment - truck components - trailers - fuel storage - rebar -steel forms - concrete - storm grates - transformers - wastewater management MARINE: decks - bilges - hulls - stem pipes -chain lockers - mast. HOME: seal cracks in basement and foundations - Garage floors - Roofs - HVAC - Pipes - Beams - Home appliances. Excellent for sealing and repairing fiberglass. NOTE: Follow instructions on label carefully. See the How Do I Use POR 15 Rust Preventive Paint? article in the Technical Articles section See the How Do I Stop Rust Permanently with POR-15 Solutions article in the Technical Articles section