M-D Building Products 4663 R-6.7 Water Heater Insulation Blanket Go to amazon.com Related posts How to buy the best insulation blanket? FeatureReduces energy cost*Easily installedR-6.7 Insulating Value DescriptionWhite vinyl backed fiberglass blanket. Designed for gas, oil or electric heaters. Fits up to 60 gallons. Includes adhesive tape for easy installation. Bagged.