POR 15 is a High tech,high performance rust-preventive coating designed for application directly on rusted or seasoned metal surfaces.It dries to an incredible rock-hard,non porous finish that won&＃39;t chip, crack or peel and prevents rust from recurring by protecting metal from further exposure to moisture.use it to coat rusty frames,floor pans, farm equipment,marine equipment,industrial facilities or anywhere rust occurs. Our Products are designed to work as a complete system.When used together ,they provide you with a finish that will not only stop rust,but will also prevent it from occurring again.