PROFOIL PANEL are high extruded polystyrene panels covered on both sides with a steam-and waterproofing membrane. The blue membrane has a printed pattern for ease of cutting on one side and is adhered to the polystyrene extruded panel using and waterproofing epoxy coating that ensures rigidity and resistance to compression. The panels are avaiable in multiple sizes and thicknesses. PROFOIL PANEL has a 0.1 perm. TCNA-0716-19 ASTM E96 Standard Test Method for Water Vapor Transmission of Materials, Method E.