Roof Mate Base Coating
Product Data Sheet
BASIC USES & ADVANTAGES
Roof Mate Base Coating was especially developed for use
in embedding reinforcement fabric at detail areas. It is also
used for achieving film build prior to topcoating with Roof
Mate, Roof Mate QS, Roof Mate HT or RoofShield Coating.
It is formulated to achieve superior adhesion over metal,
conventional built-up, modified bitumen, single-ply, concrete,
board-stock and sprayed-in-place polyurethane foam, and
composite shingle roof substrates. Roof Mate Base Coating
forms an elastomeric seal, uniformly covering the textured
profile of these substrates.
Roof Mate Base Coating is available in standard gray
color, which provides for a high visual contrast with the
application of the subsequent Roof Mate Coating. Roof
Mate Coating is available in White, Solar Gray, Light Tan
and Tan.
PHYSICAL PROPERTIES
ROOF MATE BASE COATING
PRODUCT DESCRIPTION
Roof Mate Base Coating is a water-based acrylic elastomer coating utilizing the latest advances in acrylic technology.
It combines acrylic emulsion polymers, powerful biocides and
non-migrating fire retardants for superior physical properties,
adhesion, durability, weatherproofing, mildew resistance and
fire retardancy. The fire retardant chemicals are permanently
locked into the cured coating and will not leach out upon
extended weathering. Roof Mate Base Coating is a
“breathing” coating, allowing moisture vapor to pass through
the film while remaining resistant to mass water penetration.
Solids by Weight
67% (±2) [ASTM D2369]
Solids by Volume
51% (±2) [ASTM D5201]
Tensile Strength
182 psi (±20) (1.83 MPa)
[ASTM D2370/D6083]
Elongation
135% (±20)
[ASTM D2370/D6083]
Hardness
60 to 70 Shore A
[ASTM D2240]
Permeance
2.7 US perms at 22 dry mils
(155 ng/(Pa.s.m²) @ 560 microns)
[ASTM E96]
Dry Time to Walk On
4 hours at 75°F (24°C), 50% R.H.
Gray at 16 wet mils (406 microns)
*Required times will increase at higher humidities
Temperature Limits
for Normal Service
Conditions
0°F–200°F
(-18°C–93°C)
Low Temperature
Flexibility
Passes 180° flex over ½” (1.2 cm)
mandrel @ -5°F (-21°C) [Federal Test
Method No.141a-6221]
Colors
Standard Gray
APPLICATION INSTRUCTIONS
WARRANTY
See applicable warranties and guarantees for complete
coverage and restrictions.
PACKAGING & SHELF LIFE
1 gallon (3.8 liter) bucket
5 gallon (19 liter) pail
54 gallon (204 liter) drum
Shelf life 18 months if unopened containers stored between
40°F and 70°F (4°C - 21°C).
SUBSTRATE PREPARATION: All surfaces must be clean
and dry, and free of any dirt, dust, oil, surface chemicals,
or other contaminants that may interfere with optimum
adhesion. All loose gravel, if present, shall be removed by
power sweeping and/or vacuuming. Remaining gravel shall
be power spud to achieve the smoothest surface possible.
Any unsound areas in the roof shall be repaired or replaced.
New asphaltic systems should be exposed to ambient
conditions for 45 to 60 days before coating. Deteriorated or
badly corroded metal shall be replaced. Metal, asphaltic, and
single-ply systems must be primed prior to application. See
gaf.com for more details.
MIXING: Thoroughly mix using a power mixer for a
minimum of 5 minutes prior to application. For 5-gallon (19
L) pails, use a 3” (76 mm) minimum diameter mixing blade;
for 55-gallon (208 L) drum, use a 6” (152 mm) minimum
diameter blade.
GAF Liquid-Applied
January 2016, supercedes March 2015
For technical, system, and warranty information, visit gaf.com or call 1-800-766-3411.
APPLICATION: Apply product with an airless sprayer,
covering the surface at an even rate. Use an airless spray
pump with a 1 gallon-per-minute (3.8 L/minute) output and
2,000 psi (13,790 kPa) pressure capability. Use a reversible,
self-cleaning tip with orifice size 0.027”–0.039” (0.69–0.99
mm) and a fan angle of 40° to 50°. Filter screens should
be 30 mesh or larger. Use a 3/8” (9.5 mm) minimum inside
diameter, nylon high pressure-type hose for lengths up to
75 ft. (23 m) from pump. For 75 ft.–200 ft. (23–51 m), use
1/2” (12.7 mm) inside diameter hose added to pump side
of existing 3/8” (9.5 mm) hose to maintain pressure and
delivery. Over 200 ft. (51 m), use 5/8” to 3/4” (16 to 19
mm) inside diameter hose added to pump side of existing
hose. Apply at a minimum rate of 100 ft²/gallon (2.5m²/L)
per coat. Total coverage depends on substrate. Rough
substrates will require more. Minimum 2 coats required.
Apply Roof Mate Base Coating liberally over the area
to be detailed, and embed the mesh so that it is centered
over the detail area. Using a brush or roller, work the United
Coatings™ UniTape Seam Tape into the Roof Mate Base
Coating to eliminate air pockets, wrinkles, and gaps. Apply
additional Roof Mate Base Coating as necessary, at a
minimum of 1 gallon per 100 ft² (0.4 L/m²), to ensure that
the UniTape Seam Tape is thoroughly saturated, encapsulated, and fully adhered to the substrate. United Coatings™
Roof Mate Butter Grade Flashing may be used instead of
UniTape Seam Tape.
APPLICATION NOTE: Requires complete evaporation of
water to cure. Cool temperatures and high humidity will
slow curing.
Apply in two coats at a minimum total rate of 1-1.5 gallons
per 100 ft² (.4-.6 l /m²). Consult GAF’s product specifications for specific film thickness requirements to qualify for
GAF’s product warranty.
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Roof Mate Base Coating
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Product Data Sheet
LIMITATIONS & PRECAUTIONS
Roof Mate Base Coating should generally not be used
over cold storage tanks or buildings where a vapor barrier is
required. Roof Mate Base Coating will freeze and become
unusable at temperatures below 32°F (0°C), or when there is
a possibility of temperatures falling below 32°F (0°C) within a
24-hour period after application.
Roof Mate Base Coating requires complete evaporation
of water to cure. Cool temperatures and high humidity retard
cure. Do not apply if weather conditions will not permit
complete cure before rain, dew, fog or freezing temperatures
occur. Do not apply in the late afternoon if heavy moisture
condensation may appear during the night.
Roof Mate Base Coating may be applied to a wide range of
clean, dry and structurally sound substrates. Slope for positive
drainage is recommended for any roofing application. It is the
responsibility of the applicator to ensure that the roof is sound
and sloped properly, and that the expansion joints, vents and
flashings have been installed as specified or required.
Avoid breathing of vapor or spray mist. For exterior applications, approved (MSHA/NIOSH) chemical cartridge respirator
must be worn by applicator and personnel in vicinity of application. Check filters frequently to ensure proper protection.
If used indoors, provide mechanical exhaust ventilation. During
indoor spray operations, air line masks or positive pressure
hose masks must be worn. Avoid contact with eyes and
contact with skin.
Do not apply on surfaces exceeding 120°F (49°C).
SAFETY & HANDLING
For specific information regarding safe handling of this material please refer to the Safety Data Sheet (SDS).
GAF
1 Campus Drive
Parsippany, NJ 07054
1-800-ROOF-411
gaf.com
See applicable warranties and guarantees for complete coverage and restrictions.