24 OZ, Acrylic Latex Grout Additive, Use In Place Of Water When Grouting Ceramic & Most Stone Tile, Highly Water Resistant, Increases Grout Flexibility, Required For Exterior Grout Applications Subjected To Freeze/Thaw Conditions, Meets ANSI A118.7 Specifications, Can Be Used With Portland Cement Grouts Or Sattillo Sanded Grouts.