Quikrete Concrete Acrylic Fortifier is an acrylic resin admixture designed to enhance bonding and water resistance of concrete patching materials, stucco, surface bonding cement, thin-set mortars and tile grouts. Exceeds the requirements of ASTM C 1438. Improve bonding to existing surfacesEliminate moist curing in most circumstancesReduce permeabilityExcellent toughness and good adhesion to clean stucco, concrete or masonry surfacesReduced drying shrinkage which reduces the tendency for cracking and crazing in thin repairs