Nansulate Greenhouse from Industrial Nanotech Inc. is a thermal insulation coating that is applied as a thin film to clear greenhouse panels to reduce energy consumption without reducing light transmission. The coating allows over 90 percent of visible light to pass through glass glazing. The insulation can be applied easily and quickly with a conventional paint sprayer or brush and costs about 37 cents per square foot for a three-coat application. It will last for 10 years.