The EcoTec Radiator Insulation Kit is a fast and cost-effective way of maximising the performance of your radiators within your home. Did you know that around 40% of energy from radiators can be lost through the walls? This is why it is absolutely vital to insulate behind them. Insulating your Radiators means that you can literally heat your home for less money! The EcoTec Radiator Kit consists of True Aluminium Foil on both sides of an air bubble membrane. This True Aluminium Foil reflects over 95% of radiant energy back into your home!