Dow GREAT STUFF PRO™ - Manual (Page 3)

Applic ation
Gun-applied version:
1. Adjust flow control screw on
back of gun to an open position.
Immediately press trigger to fill
gun with foam while dispensing
into an appropriate waste
receptacle.
2. keeping can inverted, insert
applicator nozzle into the
penetration to be filled and begin
dispensing foam slowly. Fill gap
less than 50 percent full to allow
for proper expansion.
3. The foam dispensing gun is
recommended to control size of
the foam bead (from 1/8" to 3" [3
mm to 75 mm]). This is achieved
by squeezing the trigger on
the foam dispensing gun or by
adjusting the flow control knob on
the back of the gun to set how far
the trigger can be pulled (Figure 5).
4. If the gap is overfilled, stuff
excess cured foam into the gap
with a blunt tool or trim away
with a sharp knife. Foam will be
tack-free in less than 20 minutes
and can be trimmed in 1/2 hour.
It is fully cured 1 hour after
application.**
5. Clean foam dispensing gun
periodically by rubbing the end
on soft wood to free it from foam.
Do not use a sharp object to
clean foam dispensing gun. Use
a solvent cleaner such as GREAT
STUFF PRO™ Gun Cleaner
between extended periods of
non-use.
6. To store partially used can,
tighten flow control screw closed
and store can upright with gun
attached. Use can within 30 days
of initial use.
7. To reuse, shake can vigorously
for 1 minute before dispensing
and follow dispensing instructions
stated above.
Straw-applied version:
1. Attach the nozzle by twisting it
clockwise into the valve. Press
the button until the appropriate
size of foam bead is achieved. Fill
gap less than 1/3 full to allow for
proper expansion.
2. If the gap is overfilled, stuff
excess cured foam into the gap
with a blunt tool or trim away
with a sharp knife. Foam will be
tack-free in less than 20 minutes
and can be trimmed in 1/2 hour.
It is fully cured 1 hour after
application.**
3. Clean straw periodically by
rubbing the end on soft wood to
free it from foam.
4. When finished, bend the straw
back onto the plug on top of
the trigger assembly. The plug
prevents moisture from entering
and curing inside the straw or
valve.
5. To use after storage, gently rotate
or twist the straw to break the
adhesive bond of the foam. Pull
the straw off of the plug and
dispense.
Figure 5
CAUTION:
Do not inject the foam sealant
into blind cavities, such as
window mullions. The foam
must be exposed to atmospheric
moisture to thoroughly cure.
TIP: Using grease or petroleum
jelly in the adapter of the gun
may reduce possibility of foam
gluing the can on the gun.
TIP: Always close the flow
control knob when the gun is
not in use.
TIP: Treat your gun like a tool.
The better you take care of it,
the longer it will last.
TIP: Apply foam in a continuous
bead, with no voids or breaks, to
achieve an effective seal.
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
**Dependent upon temperature, relative humidity and size of foam bead