Magnesium/Potassium/Sodium Blend. Fast Acting Zero Ice Quickly Breaks The Molecular Bonds That Create Ice, Reducing It To Water. Keeps On Working For Hours, Even At Temperatures Below 0 Degrees Fahrenheit. Safer To Handle. Safer On Carpets And Floors. Will Not Leave White, Filmy Residue. Safer Around Grass And Shrubs. Will Not Dry Out Plant Life. Safer On Shoes And Leather Goods. Jug With Built-In Handle And Reusable Cap. CAUTION - Do Not Use On Fresh Concrete, Porous Concrete Or Patio Block. For Best Results On Concrete Surfaces, Brush Or Sweep Away Puddles After Melting Has Occurred.