Phosphoric acid ester formula promotes paint adhesion to difficult substrates, like galvanized steel and aluminum. Ideal for rub through in primer prior to application of color and new bare metal panels. Features:Etch and prime bare metal in one stepFlat fan high atomization nozzle offers a large fan pattern and excellent coverageCreates an anti-corrosive barrier that prevents steel from rustingCan be directly top coated no sanding requiredIdeal for rub through in primer prior to application of color, new bare metal panels and over bare seams before sealant applicationPrimes bare metal surfacesPromotes paint adhesion to difficult substrates such as galvanized steel and aluminumPrevents steel from rustingIdeal for rub through in primer prior to the application of colorFast dryingNo sanding required