/ Model Tips / Glue
Niedzielski and Stephen Niedzielski.
Here is a quick explanation of the different glues used to build model airplanes.
Ambroid cement is readily thinned and cleaned with acetone.
It works well for gluing wood to wood and is somewhat flexible. Joints
can be softened for repairs at a later date. Sands well during finishing
if not globbed on. This is a waterproof glue. Seldom used by modelers today,
it can be purchased online from full size boat building suppliers.
Yellow woodworker's or aliphatic glue, available from most
craft and hardware stores. Thin this with 25-40% water. It holds
well for gluing wood and tissue, but will take hours or overnight
to dry. Yellow glue is quite flexible depending
on how much you thin it. It can be easily cut through with a sharp
razor knife and sands well. This glue is water resistant but not waterproof
and requires doping the surface to improve water resistance or for
Instant glue known as CA or cyanoacrylate glue, comes in different
viscosities and reacting speeds - thin, medium and thick, with cure times
of 5 seconds to 2 minutes. Most model builders use CA glues.
We use JET CA Glues.
Applying this type of glue can be done via a small diameter
tip on the end of a bottle allowing a tiny drop to be
placed where you want it or by placing several drops on some plastic
and dipping the end of the wood to be butt joined into the glue followed
by putting the piece into it's location. The thin type of glue works
best with the applicator tip, however the dipping method is better for the thicker
glue. Thick cyanoacrylate glue is heavier but very strong, the joint is stiff, it
does not sand easily, but it is waterproof. Jet SET accelerator can be sprayed where you have
just finished applying the glue or by putting the glue on one piece
and spraying accelerator on the other surface to be jointed. Make sure you are ready
as the joint sets very quickly. Cyanoacrylate glue does not work for applying
Glue sticks. To apply tissue we use UHU stic blue
glue sticks, a permanent glue which goes on blue and dries clear.
Just spread it evenly along the wood, lay the dampened
tissue on carefully and pull taut. Another option involves using
thinned white glue. You paint this on the wood, then lay the dampened
tissue in place. Finally seal and water proof the tissue. Clear Krylon spray
paint is our choice for water proofing. It does a great job of sealing
the tissue with minimal fumes.
Dope. Yet another technique is to paint several coats of
dope on the frame. After it dries, damp tissue is laid in place and
then dope is brushed on along the wood structure through the tissue.
After the tissue dries seal it with several coats of dope. Dope can be purchased
in colors or clear. Ventilation is mandatory when using dope.
Foam Safe CA Glue. For building models that contain foam parts
UFO Odorless glue is the most effective. An
added benefit is practically no fumes.
On a final note: Always remember to read the manufacturer's warning
label and follow their instructions.