Grace Perm-A-Barrier® Air Barriers

To provide proof that our air barrier assemblies function as a continuous air barrier, Grace has successfully completed independent testing on its Perm-A-Barrier air barrier products in accordance with ASTM E 2357 Standard Test Method for Determining Air Leakage of Air Barrier Assemblies. Testing Perm-A-Barrier Liquid, Perm-A-Barrier VP and Perm-A-BarrierWall Membrane, the ASTM E 2357 test entails installing a full air barrier assembly onto an 8 ft by 8 ft (2.5 m by 2.5 m) mock-up of a realistic exterior wall assembly. Measuring performance simulating real-life commercial structures, the mock-up includes a tie in to a foundation wall, tie in to a roof, duct and pipe penetrants, electrical outlet penetrants, a window opening and post applied brick ties. All these conditions must be sealed and flashed to the air barrier assembly to withstand positive and negative sustained wind and wind gust loading simulating real life in place conditions.