FLEXTRA Sealant is also recommended as a bedding compound for the installation of cellular glass insulation. In this application, it protects both the insulation from abrasion and metal surfaces from corrosion.
FLEXTRA Sealant is supplied in a special “buttery” consistency, which facilitates application to insulation surfaces without stringing or excessive drag. It may be applied at temperatures as low as 50°F (10°C) without difficulty.
FLEXTRA Sealant meets requirements for LEED IEQ 4.1 Low-Emitting Materials, Adhesives and Sealants. VOC: <420 g/l, less water and exempt solvents.
FLEXTRA Sealant contains no asbestos, lead, mercury, or mercury compounds.
Trowel, Power Extrusion
AVERAGE WEIGHT/U.S. GALLON (ASTM D 1475):
11.6 lbs. (1.39 kg/l)
AVERAGE NON-VOLATILE (In use)
82% by volume (89% by weight)
73% by weight (ASTM D 2369, 110oC)
COVERAGE RANGE (FSTM 71):
12 to 25 sq. ft./gal. (0.29 to 0.61 m2/l)
1/8 in. to 1/16 in. wet film thickness (3.2 mm to 1.6 mm)
Skins over in 2 to 3 hours, essentially non-drying.
SERVICE TEMPERATURE LIMITS (FSTM 202):
(Temperature at coated surface)
PIR / Urethane Foam
Minus 261°F to 200°F (-163°C to 93°C)
Minus 150°F to 200°F (-100°C to 93°C)
WATER VAPOR TRANSMISSION RATE (ASTM E 96):
The water vapor transmission through 1 in. of impermeable insulation in 12 x 18 in. blocks with 1/8 in. joints of 95-50 is too small to measure.
WET FLAMMABILITY (ASTM D 93):
Flash point 145°F (63°C)
Combustible. Flame spread and fuel contribution negligible when used as sealant in 1/8 in. wide joints of incombustible insulation.