Contour Repair Compound is reinforced with aluminum for a stronger, corrosion-resistant repair. Superior corrosion resistance and adhesion Repair factory-leaded seams and high-strength applications Perfect for areas prone to moisture Includes hardener Fortified with aluminum particles 's uniquely formulated filler is fortified with aluminum particles to produce a repair with extra strength, corrosion resistance and durability in galvanized steel and aluminum. Includes Liquid Hardener. Smooth Rough Castings A uniquely formulated filler fortified with aluminum for strength, corrosion resistance and durability. Use to repair factory leaded seams and high strength applications as well as areas prone to moisture. Its corrosion resistant properties prevent rust from coming through the repair.