ECOFLEX-PS is designed to be a permeable membrane for cavity wall construction that may be applied on a variety of surfaces including concrete, concrete block and dens glass. ECOFLEX-PS is to be applied by roller or sprayer to form a monolithic vapor permeable air barrier. ECOFLEX-PS is a medium viscosity water based, copolymer latex emulsion, which exhibits excellent bonding, elongation and waterproofing characteristics.