Techniseal® HP NextGel™ Jointing Sand is a state-of-the-art mix of graded sand (ASTM-C144) and binder that flows smoothly down joints for a fast and effective installation of pavers or slabs with false or wide joints. It is also recommended for surfaces exposed to heavy traffic and for high-humidity areas. Easy to use, NextGel™ Jointing sand starts to set only a few minutes after being activated with water and quickly becomes resistant to water erosion (rain, splashes, sprinklers, etc.). NextGel™ Jointing sand offers great resistance to weed growth, insect invasion and erosion. Techniseal® HP NextGel™ Jointing sand has been manufactured with a revolutionary technology called NextGel™. NextGel™ radically transforms and improves the properties and behavior of jointing sand, resulting in the first ever true "no dust", "no haze" and "no waste" jointing sand for a fast, clean and profitable installation.