Magica Rust Blocker High Performance Rust Protection (32 Oz)

Can be used on any ferrous metals, rusty iron or steel objects, and is a metal treatment that seals out moisture to prevent rust from reoccurring It is a water-based primer that mixes chemically with rust to create a black inert substance that can be painted over, hiding any rust and preventing further damage from corrosion Will not work on aluminum, copper, stainless steel or galvanized metal. Magica Rust Blocker is ideal for treating rust on any ferrous metals. For example, it can be used on autos, trailers, farm equipment, tractors, fences & gates, iron railings, sheet metal, cast iron, the exterior of metal tanks, lawn and garden equipment.