Atlas EnergyShield PanelCast Tri-Lam is a rigid closed-cell polyisocyanurate insulation board bonded to multiplex facers comprised of tri-laminate layers of foil, kraft, and poly on both sides of the board. This product is designed for use with concrete walls ONLY where boards are sandwiched between two layers of concrete with connectors holding together the finished panel. It is manufactured using environmentally responsible processes and formulations, containing no CFCs, HCFCs or HFCs, resulting in Zero Ozone Depletion Potential (ODP) and Negligible Global Warming Potential (GWP) while contributing to LEED credits. Nominal thicknesses range from 1.0" - 4.0" with R-values up to 26.0