Actron's Rustenz Rust Preventing Capsule, No. CP5500, a portable corrosion protection capsule, protects items from rust by creating an invisible shield around objects for up to two years. Using patented Volatile Corrosion Inhibitor technology, the capsule emits powerful, corrosion-inhibiting molecules into an enclosure, protecting all exposed metal surfaces with a tin protective layer that prevents reactions on the surface that cause rust and corrosion.