Mooney M20B - Sealant Applicationinstructions

3.
Slowly
stir,
to
avoid
excessive air
entrapment,
the accelerate,-
into
the
base
compound
and
thoroughly
mix
appro~imately,
seven
to
ten
minutes.
Be
sure
to
scrape
the
sides
and
bottonl
of
the
container
in
order
to
include
all
compound
in
the
mixture
and
to
insure
uniform
blending.
Scrape
mi~ing
paddle
periodicnllv
to
remove
unmixed
compound.
4.
.Take
a
small
amount
of
sealant ~om the
mixture
with
a
clean alumi-
num
strip
and
spread
the
sealant,
then
visually
examine
the film
of
sealant to
ascertain
if
the accelera~or
is
visable
in
p~cle
folsa.
If
particles
of
accelerator
are
visible,
r~ntinue
the
mixing operation
If
course
particles
of
accelerator
persist
after
mixing,
the
mixed
batch
and
remaining
accelerator will
be
rejected.
5.
Put
a
small
amount
of
sealant
in
the
accelerator
c4ptair,~
and
mix
to
assure
that
all
the
accelerator
is
mixed
into
the se~lant.
4. Sealant
Application
Instructions.
The
following
are
for
the
reapplication
of
sealant
removed
in
order
to
repair
ta~
leaks.
A.
Brush
Sealant.
1.
Apply
a
brush
coat
of sealant
compound
PR
1221-A-lh
or
A-2
over
all
seams,
rivets,
nuts,
and bolts if
removed
for
repair.
2.
A
one-inch stiff
paint
brush
is
recommended
for
this
operation.
Brush
strokes
should
be
parallel
to
seams
forcing
the
sealant
into
all
gaps.
Use
a
circular
brush
action
to
deposit
an even
coat
of
sealant
around
~ivets,
nuts,
and
bolts.
Coat
should
be
approximately
1/32
of
an
inch
thick.
3.
-d~nsiderable
bruslr
action
should
be used
to
force
sealant
into
all
small
crevices
to
obtain
good
adhesion.
Air
pockets
trapped
under the
sealant
due to
improper
application
will.
open
up
in
the
form of
a
hole
or
void
soon
after
it has
been
applied. Repair
should
be made
by
pressing
the
sealant
in
place
with
a
spatula
while
it
is
still
in
the
application
life
state.
4,
In
cases
where the
top
of
a
flange
is .040
inches
or
less and
where
application
of
a
successful
fillet
would
not
be
clearly
defined,
apply~
two
brush
coats
of
sealant
compound
in
approximately
1/32
inch thick
coats.
Allow
first,
coat to
cure
approximately
four
hours
or
unY1
it
becomes
rubbery
before
application
of
the
second
coat.
The
second
coat
should
extend
of
an
inch
past
the
previous
coat.
B. Fillet
Sealing.´•
1.
General
Requirements.
a.
Brush
coat
sealant
must
be tack free
before
applying
sealant.
b.
See
Figure
24
f~r
typical
fillet
size.
c.
Fillet laid
on
intersection
joints
shall
be
joined
together
to
pro-
duce
a
continuous fillet.
d
All difficult and
hard to
reach
areas
to
ba
sealed
first,
to
prevent
the
possibility‘orl
their
being
overlooked
or
incorrectly
sealed.
OLDWILLWAYNE