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CHEMORAN
Advice on storage of Chemoran products
Chemoran products must be protected from exposure to water and to long-term exposure to atmospheric
moisture. When mixed with water, a chemical reaction can occur which leads to a reduction in some of the
product’s properties, especially with mixing-grade bitumen emulsions, which may show a reduction in
coating/adhesion to certain aggregates.
Identifying water contamination
Water will sink to the bottom of the product container and form a distinct clouded viscous layer. The clear
unaffected product should be carefully decanted off without disturbing this clouded layer and used as
soon as possible. If unsure, contact Chemoran.
Identifying atmospheric moisture contamination
This takes place slowly on the product surface exposed to moist air. It is identified as a viscous clear skin.
Bulk storage tanks are more likely to experience this due to long storage periods and open vents. Smaller
containers with small amounts of products can be damaged on long storage especially if they
are not sealed.
Storage at low temperature
Products must be protected from frost. Continued cold weather storage can lead to major increase in the
viscosity and some precipitation may take place at temperatures below the cloud point (refer to product
data sheet). If this occurs the product should be heated or agitated thoroughly to insure a homogeneous
mixture before use.
Precautions to be taken when storing the product drums and IBCs
• When in use, protect from rain
• Seal when not in use
• Do not leave small amounts in containers for long periods before using it
Bulk storage tanks
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Do not have vents open to the atmosphere. Install a two-way vent valve or keep the
product heated at a temperature above ambient temperature
Inspect the inside of the tank before filling. Flush with some product and drain if a
residue or water is present
• Inspect the seals on all orifices

Advice on storage and handling of GAP
In addition to the general Advice on storage of Chemoran Products and the COLAS Technical Note n°120-A,
it’s important to note the following:
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High viscosity at low temperature is inherent to the GAP emulsifier. This may cause a
problem when pumping the GAP, especially at the beginning of the season, after
continued cold weather storage over the winter months.
GAP is more at risk to atmospheric moisture than other emulsifiers. It is known that the
GAP emulsifier forms a viscous layer/skin when exposed to atmospheric moisture; the
thickness depends on the length and temperature of the exposure. At low temperature
this effect is more pronounced.
Storage of GAP at low temperature
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GAP must be protected from frost. Continued cold weather storage can lead to major
increase in the viscosity of GAP
GAP requires no reheating if pumped above 15-20°C.
GAP at low temperature should not be continuously agitated or re-circulated back into
its container unnecessarily.
Protection against atmospheric moisture and water
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GAP must be protected from exposure to water and from long-term exposure to
atmospheric moisture.
Very little or no layer/skin forms on GAP in sealed containers, or if the GAP is maintained
at 30°C or higher.
Chemoran recommendations
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GAP needs to be protected from frost, and ideally maintained at a temperature 20°C or
higher, during winter storage.
When using GAP, its exposure to atmospheric moisture should be minimised.
If GAP has developed a skin or a viscous layer, it should be heated to 30°C to
re-homogenise the liquid before use.
Stocks of GAP should be reduced over the winter months, unless it can be stored at
temperatures of 20°C or higher.
If you have any further queries, please do not hesitate to contact us through www.chemoran.com
Revision n°1 (16/10/2012)