3M Weld Through II Coating - 12.75 oz Gray Anti-Corrosion Primer for Metal Welding (Covers 528 sq ft) - Perfect for Automotive Repair, Metal Fabrication & DIY Projects

3M™ Weld-Thru II is a convenient aerosol coating designed to prevent corrosion between welded metal surfaces. Featuring a zinc base that draws corrosion away from bare metals, it helps prevent costly comebacks due to corrosion at welds. Spray coating applies fast, resists weld spatter common to some weldable primers and dries in as little as 5 min, increasing shop efficiency and productivity.