It is fire-resistive, fibrated, water based, indoor/outdoor vapor barrier duct sealant for low, medium and high velocity heating and air conditioning ducts. It should perform as a tough and flexible adhesive and sealant, forming a durable seal against air leakage when used with or without reinforcing tape or membrane.

Specifications:
COLOR: Light Gray
BASE MATERIAL: Synthetic latex emulsion
CONSISTENCY: Paste
APPLICATION CONSISTENCY: Brush, Trowel, Caulking Gun, or Power Extrusion.
AVERAGE WEIGHT / U. S. GALLON (FSTM 3): 11.6 lbs. (1.35 kg/l)
AVERAGE NON-VOLATILE (FSTM 9A): 55% by volume (69% by weight)
VISCOSITY: Soft buttery gel with a typical viscosity range of 130, 000 - 160, 000 cps.
COVERAGE RANGE (FSTM 72):
Brush: 25-50 sq. Ft. /gal (. 6-1.2 m2/l)
0.064 in. (1.6 mm) -0.032 in. (0.8 mm) wet film thickness
Caulking Gun: 125 lineal ft. Per 10.5 fluid oz. Tube, 1/8 in. Bead (38 m per. 31 l tube, 3.2 mm bead. )
30 lineal ft. Per 10.5 fluid oz. Rube, 1/4 in. Bead (9 m per. 31 tube, 6.4 mm bead).
TEMPERATURE RESISTANCE: -30C to 110C
SERVICE TEMPERATURE LIMITS (FSTM 165): 20F to 200F (-7C to 93C)
STORAGE TEMPERATURE: 5C to 35C
APPLICATION TEMPERATURE: 5C to 50C
DRYING TIME 73F (23C) 50% RH (ASTM D 1640):
Set to Touch: 1 hour
Dry Through: 24 hours
WATER VAPOR PERMEANCE: ASTM D 3278 Procedure A, 0.45 perms (0.30 metric perms) at 35 mils (. 9 mm) dry
WET FLAMMABILITY (ASTM D 3278): No flash to boiling, over 210F (99C)
SURFACE BURNING CHARACTERISTICS (ASTM E 84):
Flame Spread: 5
Smoke Developed: 0