Why moisture develops in containers
During long sea voyages, temperature differences between day and night or between climate zones can cause moisture in the container air to condense into water, often called 'container rain'. This is a general physical phenomenon in logistics, not a statement based on specific FUCACO measurements.
Goods themselves-wood, textiles, paper and agricultural products-may contain moisture that raises humidity inside a sealed container during transit.
Factors to assess for container moisture control
Type of goods and their initial moisture content before loading.
Expected transit time, route and climate zones.
Loading methods, ventilation and yard storage conditions before and after transport.
Packaging inside the container, including cartons, pallets and liners, and its existing protection.
Desiccant format suitable for the load volume and layout inside the container.
The role of container desiccants
Hanging desiccant bags are commonly used to help reduce moisture risks during transportation. They support risk management and do not guarantee prevention of condensation under every condition.