The secret lies in the por15's curing process. Most paints dry through evaporation but por15 dries faster when moisture is present. Now add to that por15's incredible hardness, toughness flexibility you have a coating that is practically indestructible. Por15 is great for auto restoration but its also, a state of the art concrete preservative floor coating. Try the many uses of por15 and you'll understand why this incredible. Product is now sold in 52 countries around the world. Use por15 to protect expensive valuable equipment against rust, abrasion even graffiti. Por15 also has excellent surface tolerance which means it works very well on porous surfaces.. POR-15 Rust Preventive Coating is the Only Product that REALLY Stops Rust Permanently! POR-15 Rust Preventive Coating is designed for application directly on prepped rusted, sandblasted, and seasoned metal surfaces. It dries to a rock-hard, non-porous finish that wont chip, crack, or peel, and it prevents rust from recurring by protecting metal from further exposure to moisture. Provides rust protection with a hammer-tough finish.