BENEFITS - the benefits of using kiln dried sand include its ability to resist erosion and weed growth, meaning less need for weed killers, as well as the ability to provide a stable and level surface. Easy to spread using a soft patio brush and compact , making it a practical choice for professional and DIY applications. COVERAGE - One bag of Kiln Dried Sand will cover approximately 5 metre squared of new standard block paving. For re-sanding 20kg should cover approximately 20 metre squared, this is based on a typical 50mm block. USES - Used as an infill on patios and block paving to prevent slabs moving, improve water drainage and although its not a weed killer it can help to suppress them. kiln dried sand can also be used for a topdressing as a artificial lawn sand to reduce creases,.