A free-flowing, white powder obtained by spray drying of an aqueous vinyl acetate-ethylene copolymer dispersion. It offers all the advantages of a free-flowing powder additive, such as ease of transportation, storage and handling. The product can be used in a variety of applications, such as to improve key properties of cement-based formulations for the construction industry. This powder provides flexibility and excellent impact resistance to help reduce the formation of cracks in thin-layer applications. Due to its hydrophobic properties, the product reduces the capillary water absorption in cement-based building products, making it an excellent choice for thermal insulation systems and cement-based plaster and grouts.