WC-7 Type C is a cork-filled mastic which retards unwanted moisture condensation on moderately cold surfaces. It is specially formulated for a high degree of cost effectiveness and ease of application. WC-7 Type C will effectively retard condensation on tanks, piping or equipment operating at a temperature below the dew point of the ambient air.
WC-1 Type C is suitable for application by trowel or spray. Surfaces to which WC-7 Type C is to be applied MUST be clean from oil or other contaminants. Carbon steel must be primed with a primer approved by Vimasco (Such as Amerlock 400 from Ameron Protective Coatings) prior to application of WC-7 Type C.
After proper application and complete curing, WC-7 Type C provides excellent corrosion protection, condensation control and sound deadening properties.
It is recommended that up to 4 applications of WC-7 Type C be used to obtain the specified dried thickness (depending on the desired thickness and the application conditions). Each coat should be allowed approximately 24 hours drying time (depending upon ambient conditions) before applying more material over it.
WC-7 Type C is a water-based product so it poses no health or flammability hazards on the job site.
WC-7 Type C should not be applied where it will be exposed to continual standing or running water as this will eventually soften and degrade the coating.
Product Information Data
COLOR
E2 Gray, Black (Special colors available upon request)
WET FLAMMABILITY INFORMATION
No flash to boiling (212ºF) closed cup (ASTM D 93)
COVERAGE (ASTM C 461)
4 sq. ft./gal. at 1/4” dry thickness (.11 m²/liter) at (6.35 mm)
CLEANUP
Wet state – water
Dry state – safety solvent
DRYING TIME (ASTM D 1640-69)
To touch: 2 hours Through: 72 – 120 hours
Must have minimum of 24 hours drying time between applications.
RECOMMENDED SHELF LIFE
18 months in unopened container at 40°F (4°C) to 90°F (32°C)
WEIGHT PER U.S. GALLON (ASTM D 1475)
THERMAL CONDUCTIVITY (ASTM C 518 70)
160 btu-in/hr-ft²-˚F
SOLIDS
61% by weight
63% ± 2% by volume
VOC (Volatile Organic content, less water) (ASTM D 3960)
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.
WC-7 Type C must be protected, during and after application, from precipitation, freezing, oil, grease and foot traffic UNTIL IT IS THOROUGHLY CURED. It must be protected from freezing at all times prior to application during storage and shipment.
SERVICE TEMPERATURE RANGE
0ºF to 180ºF constant (-17.8ºC to 82.2ºC when cured)