Hirshfield's Wall-Prep is designed specifically for use as a primer under most types of wallpaper and wall-coverings. It may also be used as a conventional drywall primer. It has a superior, premium 100% acrylic formulation, providing excellent adhesion, water resistance and hold out. Wall-Prep should be used as a first coat on new plaster, drywall, concrete, acoustical tile, brick, masonite or other wallboards. It is an interior primer and should not be used outdoors. It is not recommended for priming new wood. Wall-Prep should be used any time the surface to be painted may be porous or exhibit poor hold out for the topcoat. Excellent for use under glossier finish coats.