Great Planes Piper J-3 Cub 20 Kit - GPMA0158 - Manual (Page 5)

CA- or thick CA is used when extra positioning
time is needed CA- is a great gap filler and is
also used in conjunction with accelerator to
make fillets when a little extra strength is
required Curing time is about 1-2 minutes.
Accelerator is a liquid chemical that comes in a
spray bottle for use in speeding up the cure time
of all CA types It should be misted on, not
sprayed heavily on the joint Accelerator may
cause exposed CA to bubble and sometimes
change color If accelerator is sprayed on heavily
it may weaken the glue joint, so use it sparingly
A WORD ABOUT CA SAFETY
After applying CA, don't stand directly over the work, to
avoid the puff of vapors All CA glues will bond skin
almost immediately If this should happen, CA Debonder
(available from your hobby dealer) or acetone fingernail
polish remover will dissolve the CA if allowed to soak into
the bond for a few minutes Don't use vigorous means to
separate a skin bond Never, never point the CA
applicator tip toward your face' Be especially careful
when opening a clogged tip In case of eye contact, flush
thoroughly with water and then seek medical attention,
but don't panic. Please, keep CA (and all other
modeling chemicals) out of the reach of children!
Epoxy:
Great Planes has two Epoxy formulations available for the
modeler Both offer exceptional strength and convenient
working times Use epoxy when the joint requires exceptional
strength, such as when installing the firewall, when joining
the wing panels and when installing wing hold-down blocks
As with most epoxies, you mix equal parts of resin and
hardener, stir well, then apply a thin film to each part Parts
should be clamped, pinned, taped or weighted in place until
fully cured Before the epoxy cures, clean off any excess with
a paper towel A word of caution about mixing epoxy — don't
use extra hardener in the hopes of making the mixture
harder or work faster Just about all epoxies work best with
exactly a 50/50 mix When you increase the amount of
hardener you run the risk of causing the cured epoxy to
become either brittle or rubbery — neither being as strong as
a properly mixed batch.
Inch Scale
6-Minute epoxy is used for simple,
small gluing operations where
elaborate alignment is not required.
Working time (before it's too gooey to
use) is about 5 minutes, handling
time 15 minutes, and it's fully cured
in about 1 hour
30-minute epoxy is used for extra
strength (because it can penetrate
longer) and where several parts must
be aligned and checked before it
cures Working time is about 25
minutes, handling time 2 hours, and
it's fully cured in 8 hours.
Great Planes Pro Wood Glue is an aliphatic resin glue
that works well on all types of wood It is non-toxic, virtually
odorless, and dries clear Some people are sensitive to CA
and epoxy fumes, so this is a good alternative for general
modeling use Its only drawback is that it is slow to cure,
requiring the parts to be securely clamped, pinned, or taped
while the glue dries
Metric Scale
5