Smart Sand CUBE polymeric sand is a state-of-the-art mix of graded sand (ASTM-C144) and binder that ows smoothly down joints for a fast and effective installation of pavers or slabs on surfaces exposed to normal traffic. Easy to use, Smart Sand CUBE polymeric sand starts to set only a few minutes after being activated with water, and quickly becomes resistant to water erosion (rain, splashes, sprinklers, etc.). Smart Sand CUBE polymeric sand offers great resistance to weed growth, insect invasion and erosion.