Polymer dispersion of synthetic resins and admixtures. Water-based. For priming concrete surfaces prior to laying ceramic tiles and stone. For priming concrete surfaces prior to the application of waterproof cement compounds. For priming medium absorbent and low-absorbent mineral surfaces of screeds and concretes prior to the application of floor self-levelling compounds and laying the covering. Before use it must be diluted with water in the ratio 1:1 to maximum 1:3.