Road Runner 12J-RR Premium Ice Melt 12-Pound is an effective blend of calcium and magnesium pellet, potassium, and sodium chlorides. Road Runner ice melt is safe to use on driveways, sidewalks, and steps when applied as directed. The product starts melting process on contact. Safe for the environment and vegetation. Requires fewer applications than rock salt. Melts ice and snow down to -15 degrees Fahrenheit. Colorless, odorless, and does not track.