A fast-drying acrylic resin sealer for use on open grain woods prior to using filler stains. Its primary purpose is to seal and satisfy the absorption of new or bare wood and provides a good bond for Pettit and Z-Spar varnishes, undercoaters, and enamels.For most wood including mahogany, oak, ash, fir, teak and plywood. NOT For use below the waterline.