Highly concentrated synthetic resin-sticking-primer for dilution, suitable for strongly and differently absorbent substrates. It is also solvent-free and dries quickly. It is suitable for the pre-treatment of calcium sulfate screeds, cement screeds, dry screeds, lime cement and gypsum plasters as well as gypsum plasterboards and gypsum fibre boards. For walls and floors, indoor and outdoor areas. Very low emission.