General’s The Masters Brush Cleaner & Preserver - 1/4 Oz is made with the Original B&J Formula. It cleans, conditions, and restores paint brushes in one step. It removes oils, acrylics, watercolours, stains, and varnishes. For use on sable, natural bristle and synthetic brushes. It gives off no harmful fumes or odours, and it's safe for use in the classroom or studio.