The cargo doors on our new 20ft shipping containers are engineered to offer a limited, weather-resistant seal, producing specified your contents continue on for being Harmless and dry. ● Corten Metallic: The containers are made of Corten steel, a selected kind of steel with greater resistance to rust and corrosion. https://foodtrucksmart.com/product/20%E2%80%B2-x-8%E2%80%B2-x-8-5%E2%80%B2-tall-new-shipping-storage-container-wind-and-watertight-camo-6/