Item number: 8717931410236 View all Tonzon products > View more: Central heating boilers > Did you know that a lot of heat is lost through the walls behind radiators? Such a shame! Save this heat by applying Tonzon window sill film (in addition to radiator foil) to the underside of the windowsill. This improves heat transfer into the room. The window sill film is attached like a spoiler above the radiator, allowing the heat to flow more effectively into the room. Saves on gas consumption and your energy bill! Easy to apply. It combines well with radiator foil and radiator fans. The film is very easy to apply with double-sided tape. Product specifications Windowsill foil - White/Silver - 30cm x 5m - 30cm x 5m Item description Windowsill foil - White/Silver - 30cm x 5m Item number 8717931410236 Version 30cm x 5m Product type Foils Country of origin Netherlands Dimensions: 30cm x 5m Environmental information about Windowsill foil - White/Silver - 30cm x 5m Save significantly on your heating costs with this radiator foil.