On Nov 4, 9:09 pm, Larry wrote:
I am planning a "touchy" repair job to my canopy. I've done some test
sheet acrylic bondings with acrylic IPS Weld-On (#16). I don't like
the ugly bubbles and noticed some fine plexiglas stress cracking on
one test piece. Is there another sort of cement (eg. Weld-On #40)
which would make for a better looking bond between 2 sheets of .080 in
plexiglas? Thanks.

Larry

#16 is just the water thin #3 with acrylic dust pre-dissolved in it to
make it thick, it's still the same action, I.E. softening the existing
acrylic, then evaporating away.

If you have gaps in particular, #40 is the shizz you want. It
actually is syntesizing new, full strength acrylic, and not just
softening up your substrate. Years ago, I built a planing boat towing
tank model out of acrylic sheet, and #40 worked far better than the
Methyl Chloride solvent cements, gaps and all. Once cured, it works
just like the base material, and polishes up nice. It can be a little
different tint, it's not quite as gin-clear.