Apply Du Plast 20 with a smooth spreader. The high level of thixotropy of the mixture allows for high finishing thicknesses with just one coating. It is generally advisable to apply an initial fine layer, pressing the product down to obtain maximum adhesion to the substrate and to adjust water absorption of subsequent layers. The appearance of the finish will vary depending on whether a smooth steel spreader or a sponge spreader has been used for application. For subsequent laying of ceramics tiles it is always advisable to obtain a roughened, porous surface.