Each individual granule is coated with LIQUI-FIRE™ melting enhancer. LIQUI-FIRE™ effectively lowers the working temperature range of SNO-PLOW® allowing it to work up to 3 times faster. LIQUI-FIRE™ is very safe. It is less toxic than baking soda. Contains no dangerous chemicals. Can be handled safely with bare hands. 100% non-toxic to children and pets. Will not harm trees, shrubs, lawns or vegetation when used as directed. Green colored granules reduce the possibility of over-application, the major cause of tracking problems. Safe on carpets and floors. Leaves no oily residue. Safe for concrete when used according to the manufacturers recommendations. Contains an anti-corrosive chemical to help fight corrosion of exposed metal.