Foster® 65-05 FIRE RESISTIVE C.I. MASTIC™
FOSTER FIRE RESISTIVE C.I. MASTICTM
FOSTER FIRE RESISTIVE C.I. Mastic is a tough, durable, high solids vapor barrier and weather-coating for the protection of thermal insulation in outdoor service. Its excellent weather and fire resistance makes it suitable for use in place of conventional asphalt cutback mastic. It is an ideal surface coating for low temperature insulating applications where the insulation used is not affected by mild solvents.
FIRE RESISTIVE C.I. Mastic may also be used on heated lines, vessels and equipment in intermittent or dual temperature service to prevent the entrance of water vapor into the insulation during off periods or on cold cycles. It is outdoor rated and U.V. resistant.
FIRE RESISTIVE C.I. Mastic is produced under the classification and follow-up service of Underwriter's Laboratories, Inc.
FIRE RESISTIVE C.I. Mastic contains no asbestos, lead, mercury, or mercury compounds.
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 required. FIRE RESISTIVE C.I. Mastics may weather to a dark gray color. Always test plastic materials for compatibility when using a solvent base product. Do not use on polystyrene foam.
AVERAGE WEIGHT / U.S. GALLON (ASTM D1475):
9.6 lbs. (1.15 kg/l)
AVERAGE NON-VOLATILE (ASTM D 2369):
69% by volume (79% by weight)
COVERAGE RANGE (FSTM 72):
(Subject to the type of surface 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. 12 gallons per 100 sq. ft. minimum (4.9 l/m2) 0.192 in. wet film thickness (4.9 mm)
DRYING TIME 73ºF (23ºC) 50% RH (ASTM D 1640):
Set to Touch: 6 hours
Dry Through: 6 days
SERVICE TEMPERATURE LIMITS (FSTM 165):
(Temperature at coated surface) Minus 40°F to 200°F (-40°C to 93°C)
WATER VAPOR PERMEANCE:
(ASTM F 1249) 0.03 perms at 1/8 in. dry film thickness (0.02 metric perms at 3.2 mm) (ASTM E 96) Procedure A: 0.017 perms (0.011 metric perms) at 115 mils (2.9 mm) dry film thickness
WET FLAMMABILITY (ASTM D 3278):
Flash point 104ºF (40ºC)
SURFACE BURNING CHARACTERISTICS (ASTM E 84):
Flame Spread: 35
Tested at coverage rate of 9.2 sq. ft. per gal. (.23 m2/l)
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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