Combines the properties of two popular insulating materials in one handy roll. It can be used on both heating and air-conditioning ducts, as well as on car and truck hoods and trunks. Frost King offers innovative do-it-yourself solutions to help you insulate pipes and ductwork from cold winter nights with temps that plummet well below zero. If your ductwork and your hot water pipes are not properly insulated or not insulated at all, you could be wasting up to 40% of your monthly home energy bill. Frost kings pipe and duct insulation solutions not only save you money, theyll make your air conditioning and hot water heater work quickly and efficiently.