SGM Southcrete™ 25 SC25A5 5 gal Pail Acrylic Mortar Additive is an acrylic additive formulated for use as a direct replacement for water with any non-polymer dry-set mortars, Portland cement grouts, and joint fillers. This product enhances all physical characteristics, such as compressive, shear bond, and flexural strengths. Southcrete™ 25 is not recommended for use over plastic, metals, or cushion back resilient.