KEIM RESTAURO® STAIN is a non-film-forming mineral stain that provides a penetrating, low pigment or translucent finish when diluted with RESTAURO Dilution/Thinner. The original look and feel of natural or precast stone and masonry or brick are not filled in or altered by RESTAURO, except for color tone. It may be used as a solid-color finish (undiluted) or as a transparent stain/glaze when mixed with dilution/thinner. Pigment and opacity levels result from how much dilution (clear) is added. Stains ranging from mostly opaque to almost clear are possible.