One-component, moisture-cured preparation based on solution of polyurethane pre-polymer in organic solvents. Does not contain water. It is used for consolidating of concrete substrates, cement and anhydrite screeds before bonding of wooden floors with use of PU adhesives (i.e. BONIPUR PARKIET 2K, BONIPOX PARKIET 2K). Primer penetrates the substrate, strengthens it and binds the remains of dust. It can be used on heated substrates.