One-component, solvent-free, moisture curing polyurethane primer with a very low emission level of volatile organic compounds (VOC) for consolidating and waterproofing cementitious screeds. TECHNICAL DATA: Consistency: liquid. Colour: brown. Set to light foot traffic: after 9-10 hours. Waiting time before laying parquet using reactive adhesives: min. 24 hours, max. 3 days. Waiting time before laying parquet or smoothing layer on surfaces sprinkled with quartz: 36 hours. EMICODE: EC1 - very low emission. Storage: 12 months. Application: roller or brush. Consumption: 0.2-0.4 kg/m². Packaging: 10 kg drums.