Atlas EnergyShield® Pro is composed of a Class A closed cell polyisocyanurate (polyiso) foam core faced with a reflective reinforced foil facer on one side and a white reinforced acrylic-coated aluminum facer on the other. The blowing agent used to produce the polyiso foam core does not contain any CFCs, HCFCs or HFCs. EnergyShield® Pro has zero Ozone Depletion Potential (ODP) and negligible Global Warming Potential (GWP). EnergyShield® Pro combines high R-value, Class A foam core, durable aluminum facers and water resistive barrier attributes in a high performance rigid wall insulation. EnergyShield® Pro is designed to be used as exterior continuous insulation (CI) or may be reversed for interior applications for interior walls only or ceilings only where a clean white surface is desirable.