Road Runner, 50 LB, Premium Ice Melt, Blend Of Calcium & Magnesium Pellet, Potassium & Sodium Chlorides, Melts Down To -15 Degrees Fahrenheit, Starts Melting Process Upon Impact, Safe On Concrete Driveways, Sidewalks & Steps When Applied As Directed, Colorless, Odorless & Does Not Track, Safe On The Environment & Vegetation, Requires Fewer Applications Than Rock Salt, Pail.