Foster 60-38 MONOLAR MASTIC

FOSTER MONOLAR II MASTIC based on chlorosulfonated polyethylene rubber (formerly known as Hypalon*) is a tough, flexible, fire-resistive, elastomeric finish for protection of thermal insulation. It is also used as a vapor retarder finish for fittings.

MONOLAR II MASTIC is produced under the classification and follow up service of Underwriter’s Laboratories, Inc.

MONOLAR II MASTIC meets NFPA 90A and 90B 25/50 requirements.
 

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Product Description

AVERAGE WEIGHT / U.S. GALLON (ASTM D1475):
8.8 to 9.3 lbs. (1.05 to 1.11 kg/l)

AVERAGE NON-VOLATILE (ASTM D2369):
30% by volume (43% by weight)

SERVICE TEMPERATURE LIMITS: Temperature at coated surface.
-40°F to 250°F (-40°C to 121°C)

WATER VAPOR PERMEANCE (TYPICAL AVERAGE): Tested with reinforcing mesh.
-ASTM E96, PROCEDURE A: 0.04 perms (0.03 metric perms) at 46 mils dry (1.17 mm).
-ASTM E96, PROCEDURE E: 0.011 perms (0.007 metric perms) at 50 mils dry (1.27 mm).
-ASTM F1249: 0.047 perms (0.031 metric perms) at 46 mils dry (1.17 mm). Tested at 75°F (24°C) and 50% RH.

MONOLAR II MASTIC meets the permeance requirements of ASTM C755-19 for below ambient vapor retarder coatings.

WET FLAMMABILITY:
Flash Point: 110°F (43°C)

SURFACE BURNING CHARACTERISTICS (ASTM E84):
Flame Spread: 20
Smoke Developed: 10 – 40

 

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General Insulation Company Inc. is an insulation supplier / insulation distributor that stocks and fabricates a wide variety of industrial and commercial air barrier, vapor barrier, moisture and water barrier products for the construction market.

Foster 60-38 Technical Data Sheet

Foster 60-38 Safety Data Sheet