Corrosion FREE gives your vehicle the ability to fight back. Temperature changes from cold to hot, freezing and thawing is devastating to the seams and spot welds of a vehicle. Trapped moisture, mixed with salt and de-icing fluids only need the warm sun to cook the rot and creates rust and corrosion. The metal needs protection or buffering from this. Rust Cure bonds with the metal through its unique polarity, creating a new surface of protection. Water, oxygen and salt cannot penetrate this bond, rust and corrosion stop.