The black floor must be evenly hard, smooth, dry, clean, free of cracks, free of anti-stick agents, resistant to pressure and movement. The porosity and adhesion of the black floor must be assessed. The moisture content and absorption capacity of the cement or leveling compound as well as the room temperature, relative humidity and black floor temperature must be measured. In addition, the technical data of the product must be observed, ie the instructions on the label of our product. In case of doubt, it is recommended to contact us for advice.