Opus Concrete Frost Free is an anhydrous calcium chloride formula which is used in a variety of applications. In its liquid form it can be used to prevent and eliminate snow, ice and frost build up on hard surfaces and tarmac. Commonly used to treat pavements, parking areas and other surfaces which receive heavy footfall including pavement areas adjacent to shops, factories and where ice can be a danger. Supplied ready for use, simply spray on or brush onto affected areas to eliminate ice and snow. Fast acting and has no detrimental effect on concrete paved areas