Mosaic Mercantile Premix Grout, 8-Ounce, Black Premixed black grout Safe to use Water based, non-sanded, non-cement based formula Premixed grout is for grout lines of up to 1/8-inch Perfect for mosaic projects Premixed black grout Water based, non-sanded, non-cement based formula Premixed grout is for grout lines of up to 1/8-inch Perfect for mosaic projects