Road Crew™ ice melting crystals begin melting ice and snow instantly to create a brine that breaks the bond of ice; works effectively to -15 degrees F. When used as directed Road Crew™ will not damage trees, shrubs, flower beds, grass, or concrete. The lower chloride content, the lower the risk. The application of Road Crew™ results in one of the lowest amounts of chloride accumulation among commercial deicers.