Zerust has proven to be the absolute best way to protect your tackle against rust and corrosion. Molded right into plastic, this patented polymer emits a harmless vapor, forming a protective layer around metal surfaces. All Zerust products will maintain their effectiveness from two to five years or more, so you can count on hassle free, long lasting protection with our Tuff Tainer utility boxes. Zerust Plastabs are perfect for tackle boxes, pistol cases, ammo boxes, tool boxes and other medium sizes storage containers.