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Tip
#36
Gluing Up
(continued)
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Clamping
& Curing Times
With the
exception of cyanoacrylates, contact cements and quick-set
epoxies, virtually all glues require pressure to achieve the
best bond. Aliphatic & polyvinyl resins should be clamped
for about an hour -- slow set epoxies, mastics and liquid
hides, 2-4 hours -- and liquid hides and urea glues 12-16
hours.
The curing
times of glues vary from one minute for hot-melts to 24 hours
for practically every other commonly used glue. Most woodworkers
would agree that virtually all glue-ups should be left for
24 hours before machining or applying a finish. These curing
times, can, of course, be affected by temperature. The warmer
it is, the faster the glue will set-up. Applying glue below
the manufacturer’s recommended temperature will prevent the
glue from flowing into the wood grain properly, resulting
in a weak joint. Also, glues that normally dry clear, could
dry “milky” if the temperature is too low.
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