Since 1975, T. Clear Corporation has manufactured construction products that combine the energy-efficient benefits of insulation with the durability of concrete. Our innovative, sustainable building products stand the test of time. LIGHTGUARD® & HEAVYGUARD® - Protected Membrane Roof (PMR) System Panels WALLGUARD® - Concrete-faced, Insulated Perimeter Wall Panels PROGUARD® - Insulated Sheathing Panels THERMADRY® - Insulating Drainage Panels for Foundations ProTEC® - Structural Insulated Panels (SIPs)