Gel desiccants are regarded as the highest-performance desiccant, capable of absorbing up to 350% of its weight
Calcium Chloride desiccants – High moisture absorption capacity, absorbing up to 150% of its weight.
Mineral-based desiccants – Cost-effective for moderate moisture control, they absorb up to 70% of their weight.
Clay-based desiccants – Environmentally friendly & Mil-spec desiccant, absorbs up to 40% of their weight.
Silica gel – Best for electronics and pharmaceuticals, absorbs up to 40% of its weight.
Pro-Ex Gel 1kg
, available at
Protection Experts Australia
, is a
high-performance calcium chloride desiccant
designed for
maximum absorption and long-lasting moisture control
.

Yes, seal off the vents – this will ensure no “new” air is introduced into the shipping container during the voyage.

A shipping desiccant is a moisture-absorbing product used in shipping containers, warehouses, and storage facilities to prevent condensation, mould, rust, and packaging damage. It works by absorbing excess humidity from the air, reducing the risk of container rain, and keeping cargo dry throughout transit.

When cargo is sealed inside a shipping container, temperature fluctuations cause moisture to condense, leading to:
mould and mildew growth on textiles, food, and paper products.
Rust and corrosion on metal parts and machinery.
Warpage and swelling in wooden products and furniture.
Packaging deterioration, weakening cartons, labels, and shrink wrap.
Using high-quality container desiccants helps prevent moisture-related cargo damage, ensuring safe delivery and product integrity.

The amount of container desiccant required depends on:
Container size (20ft vs. 40ft).
Cargo type (wood, textiles, food, machinery, etc.).
Humidity levels along the shipping route.
Shipping duration (short-term vs. long-term storage).

General Desiccant Usage Guide:
20ft Container → 4 to 8 desiccant bags
40ft Container → 8 to 16 desiccant bags
High-humidity shipments → Additional desiccants for extra protection.

For precise desiccant recommendations, consult Protection Experts Australia for customized moisture control solutions. It all depends on the type of shipping desiccant and its absorption rate.

For maximum effectiveness, place container desiccants as follows:
Hang desiccant bags along container walls to capture moisture as it rises.
Distribute evenly around cargo for balanced absorption.
Avoid floor placement, as standing water can reduce effectiveness.
Allow the desiccant to have room to absorb moisture in the air, and avoid having cargo sitting directly against the hanging desiccant.

The effectiveness of shipping desiccants depends on humidity levels, temperature changes, and cargo type.
Standard usage lifespan: 45 to 90 days
High-humidity shipments: Additional desiccants may be required for extended protection

Quality container desiccants are designed to absorb moisture safely without leaking.
Pro-Ex Gel 1kg converts absorbed water into a gel-like substance, preventing spills.
Non-leak desiccant pouches ensure moisture is trapped without harming cargo.
For high-value shipments, choosing leak-proof desiccants from Protection Experts Australia prevents moisture damage and contamination.

Yes – Industrial-grade desiccants are designed for:
Tropical and humid climates where condensation is high.
Cold environments where temperature fluctuations increase moisture risk.
Ocean freight and long-distance shipments with prolonged exposure to varying temperatures.
Using high-performance desiccants like Pro-Ex Gel 1kg ensures that cargo stays dry in all conditions.

Yes, but it depends on the type of desiccant and packaging method:
Food-safe desiccants are indirect moisture absorbers designed for use inside shipping containers without direct contact with food.
Silica gel desiccants are commonly used in pharmaceutical packaging for controlled humidity levels.
Protection Experts Australia provides safe, reliable desiccant solutions for food-grade shipments and pharmaceutical transport. Speak to one of our representatives to see what desiccant would suit your needs.

For premium moisture control solutions, Protection Experts Australia offers:
High-performance desiccants for shipping containers
Expert guidance on choosing the right desiccant for your cargo
Bulk pricing and fast shipping across Australia
Order Your Shipping Desiccants Today!
📞 Need help selecting the right desiccant for your shipment? Contact Protection Experts Australia for expert advice on preventing container rain and moisture damage.

Container rain refers to moisture condensation inside a shipping container that occurs when warm, humid air cools down and forms water droplets on the container’s interior surfaces. As temperatures fluctuate during transit, this condensation can drip onto goods, leading to mould growth, rust, corrosion, and packaging damage. When the container is exposed to temperatures below the dew point, the moisture from the ambient air will condensate, which is visible at the ceiling and walls of the container. This water will then drip onto the cargo.
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Container rain is a major concern in international shipping, particularly for long-distance freight, ocean shipments, and containers crossing multiple climate zones. Without proper moisture control, it can lead to significant financial losses due to damaged products.

Container rain is caused by temperature fluctuations and humidity inside the container. Here’s a breakdown of the process:
1. High Humidity Trapped Inside the Container
Shipping containers are airtight once sealed, meaning any moisture present at the time of loading remains inside.
Cargo with a high moisture content (such as wood, textiles, paper, and food) naturally releases moisture into the air.
Even seemingly dry goods can contribute to humidity buildup.
2. Temperature Drops During Transit
As the container moves through different climates or night-time temperature drops, the air inside cools down.
Cooler air cannot hold as much moisture as warm air, leading to condensation.
3. Condensation Forms on the Coldest Surfaces
Water vapor in the air turns into droplets when it touches the cold interior walls and ceiling of the container.
This effect is especially strong in metal shipping containers, as metal conducts heat and cools quickly.
4. Water Drips onto Cargo (Container Rain)
Over time, moisture accumulates on the container ceiling and walls.
It then drips onto cargo, much like rain inside the container—hence the term “container rain.”
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Airflow Access = Moisture Access
Desiccants need
unobstructed access to ambient air
to pull moisture from it. If a desiccant is buried under cargo, crammed into a tight corner, or sealed away from airflow, it will be far less effective.
Proximity to Moisture Sources
Placing desiccants
near walls
,
under container ceilings
, or near
cargo that emits moisture
(like wood, textiles, or food) allows them to absorb humidity
before it condenses
.
Sufficient Open Volume Around Each Unit
A
hanging desiccant bag
works best when it has at least
10–30 cm of open space around it
, allowing air to circulate freely across the bag surface.

Best Practices for Desiccant Spacing and Placement
​

Avoid These Mistakes
Don’t
stack or bunch
desiccants together – it reduces surface area exposure.
Avoid
placing them directly on the floor
unless designed for it (e.g. flat desiccant mats).
Don’t ​place them inside ​shrink wrap – they can’t absorb moisture from sealed air.
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Why You Should Avoid It
Blocked Airflow = Reduced Effectiveness
Desiccants work by
pulling moisture from the surrounding air
. If they’re wrapped in plastic or tightly sealed under stretch film,
air can’t reach them
, and they can’t absorb humidity effectively.
Traps Moisture Inside
If any moisture is already inside the pallet area when shrink-wrapped, the desiccant can’t
ventilate or remove
it – it’s essentially sealed in with the cargo.
Wasted Desiccant
Even a high-performing desiccant like calcium chloride won’t help if it’s
isolated from open air
. You’ll use ​the product without getting full protection.
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Better Practice
Hang or attach desiccants
along the container walls or from lashing rings.
Ensure
10–30 cm of open space
around each unit for proper airflow.
If placing near pallets, position the desiccant
outside the shrink wrap
or
between pallets
with clear air exposure.
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Final Tip: Think of desiccants like air filters
The more air they’re exposed to, the more moisture they can absorb. For best performance, always consider
airflow
,
space
, and
strategic placement
— not just quantity.

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Mould & Mildew
Corrosion
Damaged or Warped Packaging
Collapsed Packaging
Bugs
Bad odour
Powder caking
Peeling labels
Change of taste to food

Prevents container rain & condensation damage
Extends product shelf life & maintains quality
Reduces costly claims & product losses
Ensures compliance with shipping & export regulations