Autumn and temperature fluctuations make condensation in containers more likely. Water drops on the ceiling, damp spots on packaging and rust damage can quickly become expensive – especially during long-term storage or transport. Condensation removers (desiccants) are a simple way to protect cargo without changing the container’s structure. They can be used alone or as a supplement to insulation.

What causes “container rain” – and why do condensation removers work?

When warm, humid air inside the container cools down, it condenses on cold steel surfaces and drips down as “rain.” Condensation removers trap this moisture in a sealed medium and prevent it from re-evaporating, keeping the relative humidity low. Many solutions are based on calcium chloride (CaCl₂) with a very high absorption capacity.

How it works in practice

• Choose product and capacity: For example, Absorpole® can absorb up to approx. 2 L per unit (1.5 kg), suitable for heavily loaded containers

• Place correctly: Hang vertically in lashing rings along the side walls – protected during loading/unloading and takes up minimal space

• Monitor and replace: Check the indicator/collector regularly and replace when full (for some models, several units are recommended per container depending on cargo and climate)

“Thanks for the 4 pcs. 2L Absorpole. They were already working the next day, the drops on the ceiling were gone, and now it’s completely dry.”
— Caspar, customer

When will insulation make sense?

Insulation reduces temperature differences and is the best long-term solution for containers used as permanent storage – but it’s also the most expensive. Many therefore choose condensation removers as a first step or as a supplement.

Quick checklist

• Do you see drops on the ceiling or damp marks on cartons?

• Are you storing hygroscopic goods (cardboard, textiles, wood, powders)?

• Is the container exposed to large temperature shifts (day/night, sea/land)?
  If yes, condensation removers will usually make a noticeable difference.

FAQ (short)

How many units per 20 ft container?
It depends on cargo moisture, climate and storage time. Start with several units distributed along the sides; increase for long journeys or moisture-sensitive goods.

Do they leak?
Modern solutions bind water in a gel/collector and are designed not to leak when used correctly.

Can they be reused?
Some systems and materials are designed with low CO₂ footprint and recyclability in mind; the salt itself is consumed and the unit is replaced.