A.Mark Stypczynski, manager
of technical development at Macco Adhesives/ICI
Paints in Strongsville, Ohio, responds: Rhino
Ultra Glue (800/634-0015, www.liquidnails.com) is
freeze/thaw-stable. While it will thicken at low
temperatures, it won't separate or otherwise be
adversely affected, and it'll return to its normal
viscosity upon warming.
Still, adhesives shouldn't be stored in a
freezing environment. Because these products'
viscosities are considerably higher when they're
cold, it's possible that an inadequately warmed-up
adhesive won't completely wet one (or both) of the
bonding surfaces, which could result in a failure
at some point in the life of the assembly.
In addition, cold adhesives — whether
latex, rubber-based, or reactive (such as
polyurethane) — take longer to dry or
cure, increasing the possibility that panels or
parts will shift before the adhesive has hardened;
that too can result in failure.
Finally, while most manufacturers test for
freeze/thaw stability (typically for five cycles),
repeated freezing and thawing can ultimately cause
irreparable damage to some types of adhesives,
especially latexes, making them unfit for use.