The benefits focus around a multi point Volatile Corrosion Inhibitor that is blended into the material. Perfect for use with most metals and alloys these VCI bags perform very well in the supply chain packaging metal parts that are being transported or stored. How Do VCI Bags work? The Corrosion Inhibitor contains sensitive molecules which cling to the products interior Polymer based surface. These evaporate when the bag is sealed, this creates a protective coating over the contents. It’s invisible to the naked eye and is effective against salt water, sea air, moisture and gas products. Compatibility Will protect Mild Steel, Cast Iron, Stainless Steel, Galvanised Steel, Copper, Brass, Bronze, Zinc, Tin and Silver parts. Approved to TL 8135-0043, Level 3.