High-strength, fast-setting, self-leveling compound for leveling concrete surfaces, cement screeds, tiles, and tiled surfaces before installing parquet, ceramics, PVC, and other floor coverings in residential, commercial, and similar buildings. The product is not intended as a top coat. The thickness of the layer is 5-30 mm. It is suitable for both interior and exterior surfaces (e.g., terraces or loggias in combination with BK-HidroStop waterproofing coatings) and compatible with underfloor heating systems.