MasterSeal AWB 660 Vapor Permeable Air/Water-Resistive Barrier 5 Gallon

MasterSeal AWB 660: Vapor Permeable Air/Water-Resistive Barrier 5 Gallon

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.

Recommended Uses:

• 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.)

Features:

• Approved for a 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

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 requires you to apply less material to achieve effective functioning
• Can be applied at a temperature as 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 a low wet-film thickness
• Its textured surface allows sealants, adhesives, and spray polyurethane foam to firmly bond to MasterSeal AWB 660