Evaluated Materials


Dow Performance Silicones
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Fluid Applied Membranes
Product: DEFENDAIR™ 200C Air and Weather Barrier Coating
Air Barrier Testing Results
Property
Air Barrier Assembly
Material Air Permenance
Test Methods
Air Leakage Rate of Wall Assembly (ASTM E2357)
Air Leakage Rate of Material (ASTM E2178)
Results
0.0117 L/(s • m2) @ 75 Pa
0.0023 cfm/ft2 @ 1.57 psf
0.0011 L/(s • m2) @ 75 Pa
0.0002 cfm/ft2 @ 1.57 psf
Material Thickness
@ 36 mils (wet)
@ 13 mils
Water Vapor Transmittence Testing Results
Property
Water Vapor Permeance (ASTM E96 – desiccant method)
Water Vapor Permeance (ASTM E96 – water method)
Test Methods
ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials
ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials
Metric
402 ng/Pa·s·m2
1,660 ng/Pa·s·m2
Imperial
7.028 US Perms
29.023 US Perms
Material Thickness
@ 18 mils
@ 18 mils
Product: DefendAir 200
Air Barrier Testing Results
Property
Air Barrier Assembly
Material Air Permenance
Test Methods
Air Leakage Rate of Wall Assembly (ASTM E2357)
Air Leakage Rate of Material (ASTM E2178)
Results
0.00049 L/(s • m2) @ 75 Pa
0.000098 cfm /ft2 @ 1.57 psf
0.0049 L/(s • m2) @ 75 Pa 
0.00098 cfm /ft2 @ 1.57 psf
Material Thickness
@ 28 – 34 mils (dry)
@ 15 mils (dry)
Water Vapor Transmittence Testing Results
Property
Water Vapor Permeance (ASTM E96 – desiccant method)
Water Vapor Permeance (ASTM E96 – water method)
Test Methods
ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials
ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials
Metric
402.11 ng / Pa•s•m2
1387.7 ng / Pa•s•m2 
Imperial
7.03 US Perms
24.26 US Perms
Material Thickness
 @ 15 mils (dry)
@ 15 mils (dry)