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SPRAYER SPECIFICATIONS AND RECOMMENDATIONS Suggested Spray
Systems For roof areas up
to 3000 sq ft: Graco GMAX II 7900
or Titan Speeflow 6900 or similar. For roof areas
over 3000 sq ft: Graco GH733 or Graco GH 833 or similar. Spray Nozzle Tip
should be #635 Graco,
.035, 12" fan width Before spraying
DURA 500 coating, it is
important to do a complete site assessment, checking proximity of any
items
such as vehicles, other buildings, etc., that may come in contact with
overspray
during the spray process. Extinguish all sources of ignition. Do not
allow smoking on or near the jobsite. If possible, try
to leave spray equipment on the
ground. This will reduce the risk of roof overload. The sprayer should
be set
up on a level surface with good access to roof and coating supply. To allow for
maximum safety and efficiency, use
three persons for the spray process (one for spraying, one for guiding
the
hose, and one on the ground to feed the spray equipment)..
When spraying DURA
500 coating, hold gun
perpendicular to roof surface, approximately 12"-14" away. Move gun
at a correct, even speed, overlapping each stroke approximately 50% to
obtain a
smooth, uniform product thickness (“wet on wet” spraying). When
spraying built
up roofing surfaces with gravel embedded in the asphalt, make sure all
sides of
the gravel receive coating. Gravel will have a shadowing effect if
sprayed from
one angle only, and voids will result in the membrane.
All terminations
of DURA 500 such as on
ductwork, air conditioning units, etc., must be squared-off and neat to
maintain good aesthetic value. Minimum
Sprayer Specifications: Minimum Gallons
per Minute: 2 gallons for DURA 500 Minimum Working
Pressure: 3,000 psi Reversible Tip
Sizes: .035 orifice, Fan Width: 12 (Graco 635 or similar) Recommended Hose
Length: 250' - 400' maximum (pump
dependent) Recommended Hose:
½” diameter for 200’ or less in
length, ¾” diameter over 200’ in length Recommended Gun:
Pistol Grip Flo Thru Gun complete with extension wand. |