TOPCOAT® MB Plus
Description
TOPCOAT® MB Plus is a water-based, low VOC, acrylic, sprayable polymeric
liquid, which cures to form a seamless rubber membrane. Covers and protects most
roof surfaces including modified bitumen (smooth and granulated), smooth BUR, and
metal. MB Plus is an ENERGY STAR® qualified reflective product that
will help to reduce building temperatures. MB Plus is listed by the Cool Roof Rating
CouncilSM for solar reflectance and thermal emittance. It is highly reflective,
flexible and, due to unique emulsion chemistry, resists unsightly bleed-through
over asphalt substrates better than solvent-based systems. Available in white (for
maximum reflectivity) and custom colors. It is non- flammable, presents minimal
hazard to the applicator or the environment, and cleans up with water.
Uses
MB Plus is designed to protect and restore aged roofs. This product can be used
on modified bitumen, BUR, Hypalon®, metal as a primer, wood, and
concrete. For use with water-based sealants and top coats only. Substrate shall
not pond water for a period longer than 48 hours. Surface must be free
of ponding water, ice, snow, and debris prior to application. Do not apply at temperatures
below 42°F. Substrate temperatures must be below 120°F when applying product.
Advantages
- ENERGY STAR® qualified reflectivity can dramatically decrease building
temperatures
- Highly reflective and listed by the Cool Roof Rating CouncilSM for solar
reflectance and thermal emittance
- Low VOC, non-flammable, and presents minimal hazard to the applicator or the environment
- Easier to apply than solvent-based systems for asphalt surfaces
- Limited warranty available for up to 10 years*
- Guarantees available for up to 10 years**
- Available in 5-gallon pails, 55-gallon drums, and bulk totes
For application questions, please contact GAFMC Contractor Services at
1-800-766-3411.
Applicable Standards
ASTM D-412, ASTM D-21-96, ASTM D-1475, ASTM E-1644
Note: Repair leaks promptly to avoid adverse effects, including
mold growth
*See warranties and guarantees for complete coverage and restrictions
**When used as a part of a multi-ply system
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TOPCOAT® MB Plus Technical Data
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Application Rate:
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1.0 to 3.0 gallons/100 sq.ft. total, varies by system
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Application Method:
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Airless sprayer, brush, or roller
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Application Temp (air, surface):
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42°F – 120°F
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Drying Time (75°F, 50% RH):
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Approximately 24 hours per coat
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Wet Mil Thickness:
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(1.0 Gallon/100SF) – 16 wet mils
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Dry Mil Thickness:
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(1.0 Gallon/100SF) – 9 dry mils
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Total Solids (by weight):
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65% ± 2%
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Total Solids (by volume):
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54% ± 2%
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Specific Gravity:
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1.32 ± 0.1
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Weight per Gallon:
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11.0 ± 0.5 lbs
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Viscosity (75°F):
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15,000 ± 2,000 cps
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Elongation:
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275%
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Initial Reflectivity:
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0.83 (white only)
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Aged Reflectivity:
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0.67 (white only)
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Initial Emissivity:
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0.88 (white only)
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Aged Emissivity:
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0.85, 3 year (white only)
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Initial SRI:
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104 (white only)
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Aged SRI:
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91 (white only)
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Storage:
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Store in well-ventilated area at 50°F to 80°F; protect from freezing
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Shelf Life:
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1 Year
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Clean up:
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Water before curing
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