Policril 590 is a water-based acrylic elastomeric polymer dispersion free from plasticizers, solvents and APEOs. After evaporation of water it forms a very flexible film with low residual stickiness. For its high compatibility with cement, Policril 590 is particularly suitable as modifier for cement mortars whenever high flexibility is required especially for the formulation of 2-k flexible membranes whenever -20C crack-bridging properties are required.