Pentra-Melt^™ is a fast-acting de-icer for concrete driveways, sidewalks, ramps, steps, loading docks and decks. This industrial strength formula melts ice on contact as low as -40 ºF (-40 ºC). It works to separate ice from the surface, allowing for easy removal. Pentra-Melt^™ can be used before or after a storm and is non-toxic to plant and animal life. It will not damage the concrete or leave residue.