l
F.8L Falco Construction Manual
D–19
Revision 4, March 1, 2002
Notes
Accelerator for use with Aerodux 500
. An accelerator is available which will speed curing at
low ambient temperatures and accelerate the rate of cure with radio frequency or warm pressing.
Our technical Department would be pleased to discuss this further in detail, if required.
Control of Spread to Counteract Drying-Out
. The defect known as drying-out is influenced
mainly by relative humidity, temperature and thickness of glue spread. In conditions of high
ambient temperature and low relative humidity, higher spreads may be necessary to limit drying-
out. Under average conditions (65% relative humidity and 18°C/65°F), a spread of about 225
grammes per square meter (4.5 lbs/100 sq ft) to each face of a joint is sufficient.
Gluing Preservative-Treated Timber
. Before gluing timber that has been treated with a
preservative, it is generally necessary to machine or vigorously sand the surfaces to be bonded.
Also the timber should be checked for moisture content, since this can be increased beyond
acceptable level by water-borne preservatives and may need to be reduced before gluing. Further
advice on the gluing of preservative-treated timber is available on request.
Preservative Treatment after Gluing
. Beams and components should be allowed to stand for at
least 7 days after gluing before being subjected to water-borne preservative treatment in pressure
cylinders.
Staining on Absorbent Boards
. Light-coloured absorbent boards, e.g., cement-asbestos boards,
bonded with resorcinol or resorcinol-phenol-formaldehyde adhesives may tend to show signs of
staining when subjected to exposure to weather or very wet conditions. This is because certain
soluble materials in the uncured resin are absorbed and retained by the board and may
subsequently be leached out by soaking. These materials appear as dark stains on the surface of
the board, but disappear with further weathering.
Cleaning of Equipment
. Mixers, spreaders, etc., should be cleaned by washing with warm water.
The use of a warm dilute washing-soda solution will help to remove persistent residue. Equipment
should be cleaned before the glue has time to set.
Storage
. Aerodux resins and hardeners should be stored firmly sealed in their original containers
in a cool (ideally 5-20°C) dry place. Shelf life under these conditions is at least 1 year for both
Aerodux 500 and Hardener 501.
Containers
. Aerodux 500 and Hardener 501 are available packed as follows:
Aerodux 500
: 225 kg/495 lb and 25 kg/55 lb Tighthead plain drum. 5 kg/11 lb and 1 kg/2.2 lb tins.
Hardener 501
: 75 kg/165 lb and 25 kg/55 lb Openhead plain drum. 5 kg/11 lb and 1 kg/2.2 lb tins.
Caution
. Aerodux resins and hardeners are generally quite harmless to handle
provided that certain precautions normally taken when handling chemical are
observed. These precautions amount simply to reasonable care and cleanliness.
Keep the uncured materials (resins, hardeners, glue mixtures) away from foodstuffs.
Cover any skin abrasions before starting work. Avoid contact with the skin as far
as possible during work. Where contact does occur, clean the skin with a cotton
pad (or similar absorbent material) moistened with water—ensure in particular
that glue misture is cleaned off before it has time to harden. At the end of each
working period, wash the hands thoroughly with soap and warm water. Disposable
paper towels should be used to dry the skin. These precautions are described in
Summary of Contents for F.8L Falco
Page 1: ...F 8L Falco Construction Manual...
Page 7: ...l F 8L Falco Construction Manual Revision 4 March 1 2002...
Page 21: ...l F 8L Falco Construction Manual 1 8 Revision 4 March 1 2002...
Page 29: ...l F 8L Falco Construction Manual 2 8 Revision 4 March 1 2002...
Page 43: ...l F 8L Falco Construction Manual 5 4 Revision 4 March 1 2002...
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