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MasterSeal AWB 660 vapor permeable air- and weather-resistive barrier

MasterSeal AWB 660 vapor permeable air-/water-resistive barrier

(Formerly Enershield HP)

MasterSeal AWB 660 description

MasterSeal AWB 660 (High Permeability) is a one component fluid-applied vapor permeable air/ water-resistive barrier based on Silica Fortified Rubber chemistry.

This resilient water-resistant coating may be roller-, brush-, trowel-, or spray-applied directly to approved wall substrates. It provides excellent secondary moisture protection to most wall claddings. MasterSeal AWB 660 complies with the air barrier impermeability requirements of the Massachusetts Energy Code.

Limitation

MasterSeal AWB 660 should not be used for below grade applications or on surfaces subject to water immersion.

Recommended uses

MasterSeal AWB 660 is used as an air/water-resistive barrier over the following exterior wall substrates:

PermaBase® brand cement board or other ASTM C1325 Type A Exterior approved cement boards; ASTM C1177 type sheathings, including DensGlass® exterior sheathing, eXP® sheathing, GlasRoc® sheathing, Securock® glass-mat sheathing, Weather Defense® Platinum sheathing, GreenGlass® sheathing; Gypsum sheathing (ASTM C79/C1396); new and untreated Exposure 1 or exterior plywood sheathing (Grade C-D or better); untreated exposure 1 OSB; poured concrete/unit masonry; poured concrete/unit masonry treated with MasterSeal AWB 600 FL.

MasterSeal AWB 660 provides excellent secondary moisture protection behind many wall claddings including brick, siding, metal panels, EIFS and stucco. (A slip-sheet is required for stucco claddings.)

MasterSeal AWB 660 features

Approved for project requiring Air Barrier Association of America (ABBA) performance specifications and quality assurance
Suitable for extreme temperature service; meets ASTM D5147 Compound Stability rating of 350°F and ASTM D1970 Cold Temperature Pliability with no cracks after bending a 1" mandrel at 0°F
Meets ASTM E2357, ICC-ES AC212 and ICC-ES AC148 requirements; fully qualified as an air/water-resistive barrier and flexible flashing material
Safe: water-based, low VOC and non-flammable

MasterSeal AWB 660 benefits

MasterSeal AWB 660 qualifies as both an air/water-resistive barrier and flexible flashing material because it meets ASTM E2357, ICC-ES AC212 and ICC-ES AC148 requirements
As a liquid-applied, continuous membrane it eliminates seams, lap joints and staples; transmits wind load directly to the substrate
Silica Fortified Rubber technology offers strength, durability and self-sealing properties and require you to apply less material to achieve effective functioning
Can be applied at temperature at low as -4°C (25°F) when MasterSeal AWB 960 AC is added
Applicator friendly, quick applying and fast drying; it can be spray-, roller-, trowel- or brush-applied at low wet-film thickness
Its textured surface allows sealants, adhesives and spray polyurethane foam to firmly bond to MasterSeal AWB 660