Winter Sand is a sand and salt mix, ideally used for winter maintenance. This is the type of sand used by municipalities to fight the ice and snow on our winter roads. The sand is coarse to add grit to the road or laneway, and the mixture contains approximately 20% Road salt. Road salt is halite, which is the natural mined mineral form of table salt or sodium chloride (NaCl). While table salt has been purified, rock salt contains mineral impurities, so it is typically brownish or gray in colour.