WC-5 FR is a special version of our standard WC-5 weather barrier mastic which has been formulated to provide maximum resistance to flame spread. WC-5 FR should be used in hazardous areas where protection against the spread of fire is a significant concern.
WC-5 FR is a heavy-bodied, water-based, vinyl-acrylic, breathing type mastic coating which can be used over all types of thermal insulation to provide excellent protection against weather, other moisture sources, and mechanical damage.
WC-5 FR is also resistant to oil, grease, and mild alkalis. WC-5 FR has a recommended dried film thickness of 1/16th inch, and it can be applied by brush, spray, palm or trowel (method of applications should be specified when ordering).
WC-5 FR must be protected from freezing during storage. It must be protected during and after application, from precipitation, freezing, oil, grease, and foot traffic until thoroughly cured.
WC-5 FR CONTAINS NO ASBESTOS, LEAD OR MERCURY COMPOUNDS
Product Information Data
COLOR
White, E2 Gray, Black (Special colors available upon request)
SERVICE TEMPERATURE RANGE
0ºF to 180ºF constant (-17.8ºC to 82.2ºC)
-20ºF to 200ºF intermittent (-29ºC to 93ºC)
COVERAGE (ASTM C 461)
13 sq. ft./gal. at 1/16″ dry ( 63 mils.) (.32 m²/liter at 1.6 mm)
20 sq. ft./gal. at 40 mils dry thickness (.5 m²/liter at 1.0 mm)
FLAME SPREAD INFORMATION
ASTM E 162: 5 at 1/16″ dry film (1.59 mm)
DRYING TIME (ASTM D 1640-69)
To touch: 2 hours Through: 24 to 48 hours (depending upon temperature, relative humidity and substrate)
VOC (Volatile Organic content, less water) (ASTM D 3960)
0 g/L
MEETS REQUIREMENTS FOR LEED CREDIT 4.2
WEIGHT PER U.S. GALLON (ASTM D 1475)
10.1 pounds (1.21 kg/liter)
CLEANUP
Wet state – water
Dry state – safety solvent
SOLIDS
60% by weight
51% ± 2% by volume
RECOMMENDED SHELF LIFE
18 months in unopened container at 40°F (4°C) to 90°F (32°C)
APPLICATION TEMPERATURE RANGE
40°F (4°C) to 120°F (49°C)
CAUTION
The addition of water or any thinning agent to this product will change its physical properties and will adversely affect its performance. No expressed or implied warranty will be offered on applications where this product has been thinned or altered in any manner.