Gallon of POR15Used on frames, floorboards, under fenders, engine compartments, trunk areas. POR 15 is a paint like substance which acts as a total rust inhibitor and is also very effective as a metal filler. It's consistency is approximately that of paint and it has very good spreadability (one quart covers 96 square feet). POR 15 chemically bonds to rusted steel to form a rock hard, non porous coating that won't crack chip, or peel. It works by isolating metal