A container desiccant is a type of shipping material used to mitigate humidity and prevent water damage inside shipping containers. Moisture buildup is especially prevalent during sea freight transportation, though it can also occur during land and air shipping.
Container desiccants are used to adsorb the excess moisture in the surrounding air inside a closed container thus preventing condensation from taking place when the atmospheric temperature drops. The temperature drop may occur due to change in weather, at night or when the vessel moves to a different climatic zone.