Clay Desiccants

Are you shipping goods across fluctuating climatic conditions? Then you need to consider protecting your goods from moisture damage with JMP’s Mineral Clay Unisorb Desiccants!

UniSorb® is an affordable form of transport protection for the reduction of dew point and control of condensation. UniSorb’s® innovative design allows water vapor to enter the interior of the bag easily, where it is transformed into a thick gel and will not leak, escape or spill.

UniSorb® desiccants are manufactured from Calcium Chloride (CaCl2) and clay minerals. The large 1kg and 2kg bags are encased in a fully woven material with sewn seams to offer maximum strength and product consistency. They are then sealed inside DuPont’s special Tyvek material to prevent any liquid leakage.

Independent testing by SGS International (at 37° 90% RH) has shown UniSorb® to uptake 100% of its own weight in water, without chloride migration.

When containers are loaded and shipped through fluctuating temperatures and relative humidity the possibility of condensation occurring is substantial as temperatures drop. UniSorb® helps keep the dew point temperature below the actual temperature, even when the actual temperature drops within the shipping container due to fluctuations.

"Dew Point Temperature" is the temperature at which water vapor begins to condense onto a surface forming liquid water. The liquid that results inside a container is called "Container Rain". Container rain will occur if the surface temperature of an object is equal or lower than the dew point temperature. If the relative humidity is lowered with the absorbing properties of UniSorb®, the dew point temperature is also lowered, stopping container rain.

UniSorb® Mineral Clay Desiccant Range

100 gram – Suited for electrical components and the exterior of palletised goods.

500 gram – Suited for marine and engineering components, medical applications and explosives.

1kg – Suited for machinery, boats, base metals, steel, iron, metal cans, automotive products (car seats, brake linings), electronic and digital equipment. 1kg comes with hanging hook for shipping container use.

2kg – Suited for use in 20 and 40 foot shipping containers. Ideal for protection of canned goods, glass, paper, cardboard, packed flour, pet food, cheese, milk powder, agricultural products, horse feed, leather products and pharmaceuticals. 2kg comes with hanging hook.

Clay Dessicant Performance

Condensation in your container? What are the causes?

Containerised cargo can be subjected to significant temperature variations when stored on deck in the sun, whilst in storage awaiting trans shipment, or whilst crossing the equator.

As the temperature in the container rises the enclosed air is able to absorb more moisture. There are many sources of moisture in a container – the wooden floor and pallets, packaging material and possibly the cargo itself.

Conversely, when there is a drop in temperature the air is not able to hold this extra moisture, which is then released in the form of condensation. The temperature at which this condensation takes place is called the DEW POINT.

A typical cycle is therefore:

How do UniSorb® Desiccants work?

UniSorb® desiccants are manufactured under controlled conditions in order to assure you of an absolutely dry desiccant upon delivery.

After your container has been packed, and the specially formulated film enclosing the UniSorb® bag removed, the desiccant will immediately start to absorb any moisture present inside the container.

On the container doors being closed, UniSorb® controls the humidity inside the container by continuously absorbing the moisture from the enclosed air inside the container. UniSorb® is designed to hold the moisture and not release it back into the container’s climate.

As the humidity inside the container is kept continuously low, the air is dry enough to prevent condensation forming at low temperatures.

UniSorb® will continue to absorb the moisture until it has gained approximately 100% of its own weight (see graph).

Positioning your UniSorb® Desiccants

Placing your UniSorb® in strategic positions inside your container should ensure a dry cargo out turn at the final destination. Hanging Hooks on the UniSorb® bags allow the easy application to the interior ceiling rings, located inside the shipping containers.

Innovative Design

  1. Hook – For quicker and more flexible installation.
  2. Double Packaging – Exterior made from Tyvek to prevent leakage and non-woven interior to reinforce strength.
  3. Humidity Indicator – A pink reading indicates that the humidity inside the container has reached 90%RH 37. Consistent levels of 90% and above will result in water damage, mill dew and mould.

UniSorb® if placed correctly and in sufficient numbers will protect your cargo and keep it dry.


The Active Mineral is made from Montmorillonite clay mixed with Calcium Chloride along with several physical and chemical processes including reaction, granule-making, sifting and drying.

Packaging Material – TYVEK

DuPont Tyvek® is made from 100% high-density polyethylene, which is spun into tough, continuous fibers to protect package integrity from both product breakthrough inside and rough handling outside.

Online Store

If you're a larger user of clay mineral desiccants contact us directly at JMP and we'll tailor a package to suit your requirements.

If you only require a small quantity of clay mineral desiccants visit our online store for easy purchasing and overnight delivery.

JMP's Desiccant Online Store

If you have any questions regarding our Clay Desiccants please contact us.

Cargo Protection