Calcium Chloride is used by snow removal professionals because it is safe on all surfaces and is the fastest acting ice-melt product available. It is effective at temperatures as low as -20 degrees Fahrenheit. Environmentally Friendly and Biodegradable. Water Soluble. Melts Snow and Ice faster and at lower temperatures than salts. Stops 1″-2″ of ice and snow before they accumulate on pavement.