The brown dry pigment powder is matte iron oxide pigment powder, high-purity, quality consistency, water based dye. They can add to concrete mix, cement mix, grout, mortar, plaster to get gray concrete, gray cement, gray grout, self leveling concrete. This can make cool steppingstones with concrete stamps and concrete mold. They can produce gray color for concrete crack repair, concrete patch, granite repair, grout repair. They can dye the gray wood stain, gel stains for wood, varnish, wood putty filler. They are color pigments for gray putty, sculpting clay, sculpey clay, epoxy resin color pigment. specifications: 7oz/200g