Kiln Dry Silica sand is the most economical way of infill your artificial grass. It's available in two sizes, 16 and 30 which are suitable for a wide variety of different types of faux grass applications. Smaller grains of 30 Silica Sand is applicable for putting greens while 16 Silica Sand is standard for landscape applications of any kind. If this is your first time attempting to install artificial turf yourself, we would highly recommend using our Kiln Silica Sand. It is synthetic grass sand specifically designed to be an artificial grass infill for nearly every form of synthetic turf application, landscape, or project.