Pro Primer AC is a single component, water-based, acrylic latex, general purpose primer used as a bleed-blocker, adhesion promoter and corrosion inhibitor prior to application of Paraflex STP Systems. It also promotes aggressive, high-tack finish on treated wall substrates, and is suitable for application to exterior sheathing, CMU walls, plywood and lumber, and metal surfaces. Unlike other water-based primer products, it promotes adhesion without diminishing permeability of AWB. Pro Primer AC can be used across multiple systems, from roof to wall, and can be applied by roller, brush, or spray.