Spray Techniques - Graco Roof Rigs 224483 Instructions-Parts List Manual

MOVE HORIZONTALLY
AT A STEADY RATE
Fig. 12
1
Type of Coating
Primers
Aluminum Solvent–Base
Aluminum Emulsion
Asphalt Solvent–Base
Asphalt Emulsion
Aluminum Solvent–Base
Aluminum Emulsion
Asphalt Emulsion
1
Roof coatings vary greatly. The formulas, batch,
temperature, and age of the coating all affect its vis-
cosity. If the sprayer does not atomize the coating
well, thinning and/or agitating it should help. Apply
thinned coating more heavily to get an equal dry film
thickness. For example, coating that is thinned 10%
should be applied about 10% thicker.
2
A 0.061 tip is standard with the sprayer.

Spray Techniques

Fibered? Recommended
2
Tip Size
N/A 0.031 or larger
No 0.041 or larger
No 0.051 or larger
No 0.051
No 0.051
Yes 0.061
Yes 0.061
Yes 0.061
HOLD THE GUN PERPENDICULAR TO
AND 24" (610 MM) ABOVE THE SURFACE
OVERLAP EACH STROKE BY 50%
Start the spray stroke 24" (610 mm) above the target sur-
face and pull the trigger as the gun is moving. Then, while
the gun is still moving, and as you approach the other
edge, release the trigger. This method avoids excess
material build-up at the end of each stroke.
Do not try to increase coverage by increasing the fluid
pressure! Use a slower stroke. Use the lowest pressure
necessary to get the results you want; this helps prolong
the life of your sprayer and minimizes coating lost by
overspray.
If there is a wind, angle the spray pattern into the wind to
minimize drifting.
The best way to control the rate of coverage is with the
gun tip size. A small tip orifice applies less coating. A larg-
er tip orifice applies more coating. The width of the pat-
tern depends on the fan pattern of the tip you choose.
0551