The Original and number 1 Child and Pet Safe Ice Melt. Guaranteed safe – 100-percent salt and chloride-free ice melt, non-corrosive to all metals and non-conductive will not short out circuits. Safe for animals and humans, around children and pets. Will not harm waterways, sensitive wetlands, and concrete walkways. Received the Parent Tested Parent Approved Green Seal (PTPA). Works to a temperature of -2 degrees Fahrenheit. Unused ice melt is good for years (Coloration may change, however it does not change the effectiveness of melting snow and ice). Safe Paw Concrete Safe Ice Melt Pellets come in a non-staining green color, easy to see where you have spread. Safe Paw is a patented dual-effect compound. The liquid component starts melting ice instantly while breaking its surface tension. This allows the crystal core to quickly penetrate and destabilize the ice, speeding up the melting process. All while Safe Paw’s proprietary traction agent provides slip protection. Safe Paw attracts heat to make it even more effective. The Endothermic reaction takes advantage of a solar effect. Use half the amount you would normally use of salt.