Tremco Commercial Sealants & Waterproofing has long put performance to the test with testing protocols that surpass industry standards. ASTM E2357 (Standard Test Method for Determining Air Leakage of Air Barrier Assemblies) to include Proglaze ETA Engineered Transition Assembly and the critical transition from the wall assembly to the window assembly to measure air leakage results from joining the assemblies together as well as the air leakage that passes through the assembly alone. This generates critical data that will enable the design team to make sound decisions and ensure long-term sustainability.