Foster® 30-90 VAPOR-SAFE® Mastic
FOSTER VAPOR-SAFE ® MASTIC
FOSTER VAPOR-SAFE MASTIC is a high solids water based, fire resistive, flexible vapor barrier finish for most types of thermal insulation, including polystyrene foam. It may be used over dry concrete and finishing cement.
VAPOR-SAFE MASTIC is non-flammable when wet and has a mild latex "paint type" odor. It is designed for heavy duty/indu strial use over insulation on pipes, vessels, ducts, and equipment operating below ambient temperatures. It may also be used indoors.
VAPOR-SAFE MASTIC has the water resistance and low water vapor permeance normally found only in solvent based products. It can be used in high humidity environments, and greatly retards water vapor permeation.
VAPOR-SAFE MASTIC is ideal for vapor sealing ASJ, FRK, and FSK jackets and board facings at joints, laps and over staple and weld pin punctures. It is an excellent duct board closure sealant. Do not exceed 1/8" (3.2 mm) wet film thickness.
VAPOR-SAFE MASTIC conforms with current USDA requirements regarding use in meat and poultry processing areas under federal inspection. Letter of certification is available upon request.
VAPOR-SAFE MASTIC contains no asbestos, lead, mercury, or mercury compounds.
VAPOR-SAFE MASTIC meets NFPA 90A and 90B 25/50 requirements.
VAPOR-SAFE MASTIC meets requirements for LEED IEQ 4.2 Low-Emitting Materials, Paints and Coatings. VOC: 36 g/l, less water and exempt solvents.
VAPOR-SAFE MASTIC meets the requirements of Military Specification MIL-PRF-19565C, Type II and is listed on the QPD-19565.
Store and apply between 40°F (4°C) and 100°F (38°C), protect from freezing until dry. To resist rain washoff, allow at least 8-12 hours drying time above 50°F (10°C), with a relative humidity of 50%. Higher humidity and/or lower temperature may retard drying. Always select Vapor-Safe Mastic in the white color for use over Polystyrene on outdoor installations. Always test foil and paper facings for acceptable adhesion before using. Outdoor horizontal surfaces must always drain completely. A pitch of at least 1/2" per foot (4 cm/m) is recommended. After long term outdoor exposure 30-90 may weather to an off-white color.
30-90 White; 30-91 Gray
Trowel, glove, or airless spray.
AVERAGE WEIGHT/U.S. GALLON (ASTM D 1475):
11.5 pounds (1.38 Kg/l)
AVERAGE NON-VOLATILE (ASTM D 2369):
59% by volume (71% by weight)
(Subject to the nature of material being coated). Wet coverages shown below are for smooth non-porous surfaces. Porous or rough surfaces will require higher gallonage to attain required dry thickness. 4-6 gallons per 100 square feet. 6 gal: (2.4 l/m2) .096 in. wet thickness (2.4 mm) 4 gal: (1.6 l/m2) .064 in. wet thickness (1.6 mm)
DRYING TIME 73°F (23°C) 50% RH (ASTM 1640):
To Touch: 4 hours Through: 24 hours
SERVICE TEMPERATURE LIMITS:
(Temperature at coated surface) Minus 20°F to 180°F (-29°C to 82°C)
WATER VAPOR PERMEANCE:
ASTM E 96 Procedure B, 0.013 perms (0.009/metric perms) at 43 mils dry (1.09 mm) ASTM F 1249, 0.08 perms (0.05 metric perms) at 37 mils dry (0.94 mm). Tested at 100°F (38°C) and 90% RH.
Flash point: None to boiling, 212°F (100°C).
SURFACE BURNING CHARACTERISTICS (ASTM E 84):
Flame Spread: 15
Smoke Developed: 30
Tested at coverage rate of 25 sq. ft./gal. (0.61 m2 /l) in a 4" strip.
Applied to 1/4 inch (6.4 mm) inorganic reinforced cement board. The flame spread may vary at different product thicknesses and/or when applied over other surfaces.
TM TradeMark of H.B. Fuller Construction Products Inc.
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