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<DIV>Ran across the following on Homestead Finishing website: <A
href="http://www.homesteadfinishing.com/htdocs/glues.htm">http://www.ho=
mesteadfinishing.com/htdocs/glues.htm</A></DIV>
<DIV> <SPAN id=__#Ath#SignaturePos__></SPAN> </DIV>
<DIV><EM>Yellow PVA Glues - Yellow PVA's were originally formulated to =
overcome
the negative aspects of white PVA's and are as close to an all-purpose
woodworking glue as you can get. Franklins Titebond and Elmer's =
Carpenter's Wood
Glue are both examples of this type. Some companies market a version of =
yellow
glue that is colored brown to be less noticeable on dark =
woods.</EM></DIV>
<DIV><EM></EM> </DIV>
<DIV><EM>Yellow glues are really white glues that have been modified to =
have
better woodworking properties. They are less runny because they are =
thicker and
have a higher solids content (the ratio of resin to solvent.) They sand =
better
because the resin is harder and consequently doesn't gum up and clog
sandpaper.</EM></DIV>
<DIV><EM></EM> </DIV>
<DIV><EM>While yellow glues have a number of advantages, there are =
several
disadvantages you need to take into consideration. They have a short =
open time
of around five minutes so you have to work quickly. They also have a =
high
initial tack which makes re- positioning very difficult. Also, these =
type of
glues and the white varieties have poor creep resistance. Their elastic =
nature
allows them to slowly stretch under sustained loads. This is a problem =
in bent
lamination and load bearing assemblies like structural beams. What =
happens is
that the glue is so elastic it will move, which results in eventual =
joint
failure.</EM></DIV>
<DIV> </DIV>
<DIV>Is this just urban legend or what? What I am especially concerned =
about is
laminated ribs, rib-to-panel, and bridge-to-panel joints with Tightbond. =
I know
its been stated that creep is not a problem, but I was rather suprised =
to see
the above on a website that otherwise seems to provide pretty darn good
information.</DIV>
<DIV> </DIV>
<DIV>Terry Farrell<BR></DIV></BODY></HTML>