Container rain, also known as container sweating or container condensation, actually refers to the accumulation of moisture inside shipping containers.
It occurs when the temperature inside the container is lower than the dew point temperature of the air inside. So, when the air cools down inside the container, it turns into water droplets on the colder surfaces, which can harm the stuff inside and encourage mold and mildew to grow.
Moreover, container rain is a common problem in shipping and storage, particularly in locations with high humidity or significant temperature variations.
If the air is sufficiently cooled, some of the humidity can condense. After further cooling, the water vapor in the air condenses to form liquid water. When the air cools to its dew point by coming into contact with a surface cooler than the air, the water condenses on the surface. Falling temperatures by 5 degrees are often enough to cause problems. That’s why Cargo Dry® Container Desiccant is specially produced, absorbing up to 300% moisture to keep your goods safe.
