The world's finest total care product for brushes that cleans and conditions in one step. It contains no harsh thinners, is non-flammable and is extremely safe. Using only water, it's specially formulated to remove oils, acrylics, watercolors, stains and varnishes and helps prevent paint buildup. It works beautifully on the finest sable and bristle brushes and makes cleaning up nylon and synthetic brushes a snap! GENERAL PENCIL-The Masters Brush Cleaner & Preserver. This is a simple one-step total care process to keep your brushes performing like new! It works on oils, acrylics, watercolors, varnishes, glazes and most synthetic finishes. For use on sable, bristle and synthetic brushes. This package contains a 2.5oz container of brush cleaner. Conforms to ASTM D 4236. Made in USA.