Acrylic Grout Additive is an acrylic latex admixture formulated for use in place of water when grouting ceramic tile. This additive is specifically formulated for use with TEC® AccuColor® Portland cement grouts. Acrylic Grout Additive makes joints less susceptible to water penetration (especially important when grouting wet areas). It also increases grout flexibility. Recommended for any exterior grout application subjected to freeze/thaw exterior conditions.