- Q.What is the best
exterior wood glue to use in below freezing
temperatures?
A.Polyurethane glues
are the best exterior wood glues to use in colder
temperatures. Most water-based products like
cross-linking PVAs have a minimum-use temperature
(some as high as 60°F). Because reactive
polyurethanes are 100% solids, there is no concern
with minimum-use temperatures. In fact, tests have
shown that the bond strength with some polyurethane
adhesives actually increases as the temperature
drops. Although most polyurethane glue
manufacturers recommend that their glues be applied
above a minimum temperature (usually 32°F or
40°F), they can probably be used at lower
temperatures.
— J.P.