Henry Company Technical Information Bulletin
Wax Emulsion Storage & Handling Procedures
This bulletin is complementary to the Product Data Sheets and MSDS.
Aqualite wax emulsions are dispersions of wax in water. As such, precautions are
necessary to ensure uniformity and maximize efficiency of use. Because wax is less
dense than water the natural tendency due to gravity is for the wax to float while the
water sinks. If this separation does occur prior to use, the result can be poor water
absorption values in the early stages of water-resistant board production.
All of the recommendations below are designed to keep the mixture uniform and prevent
drying. Before any emulsion is used the total solids should be checked to make sure it is
uniform and in specification.
MATERIALS OF CONSTRUCTION
Aqualite wax emulsions are alkaline with a typical pH >9. Storage tanks, pumps, valves,
and all plumbing must be compatible. Carbon steel, stainless steel, PVC and most
plastics are examples of appropriate materials of construction. Aluminum and brass
should be avoided.
All fill and recirculation lines should be 3” ID (not less than 2” ID). The line from the
storage tank to the board plant should not be less than 11/2” ID. Hydraulic calculations
are recommended to determine the appropriate pump size and piping design for each site.
Aqualite wax emulsion generally arrives warm (>80o F) at the wallboard plant.
Unloading should begin as soon as possible; at 50 – 100 gallons per minute with an air
diaphragm pump. It is recommended that the emulsion be passed through a 10-mesh
steel wire screen during offloading. A vent pipe must be open to discharge the tanker’s
contents. If a truck mounted gear pump is used for unloading, a slow speed (less than
100 gallons per minute) is recommended.
Another option for unloading is by first pressurizing the tanker, but only if the tanker and
storage tank are designed for this purpose and both are equipped with