Diamond polishing disc fi125 mmA diamond polishing disc is commonly used for sanding surfaces such as microcement, stone, concrete, stoneware or granite. A concrete polishing disc will be ideal for sanding microcement, especially as each layer of microcement should be sanded to achieve a deep surface. A diamond grinding disc is more efficient than sandpaper and is sufficient to sand more of the substrate. However, keep in mind that polishing a floor with a diamond pad is a