Duck Brand Window Insulation Kit - Winter Seal Kit Fits up to 10 Windows - Rolled Shrink Film Cuts to Size for Easy Indoor Installation - Tape Included - 62 in. by 420 in.- Clear

I tried a few brands of window film and definitely had the best results with this one. You cannot see it unless looking very closely. The tape sticks great and I have not had any loosen over at least a month, as I did with another brand within one day. With cold weather and single glazed windows this made a difference to loss of heat. Not incredibly but enough that it was well worth it. Instuctions are good but watching a video made it much more clear and turned out to be quite easy. I left mine overnight before using a hairdryer to tighten to plastic (which takes out all wrinkles! It's quite amazing and satisfying) and trimming the edges the following day. Cannot tell it is there, especially on white window frames.

Attention au format qui n'est pas très adapté aux grandes vitres. Pas facile a installer de surcroît. Pas convaincu non plus de l'efficacité. Pour le reste, le produit est conforme a la description.

Having done some research it seemed the Duck version of this was the one to go for. Great tape, super clear film. It’s tricky to install but that in its nature as window film. End result though is excellent and it’s really helping to keep my old draughty Victorian house warm.

Assumed the problem was ME with last kit. NOT. (I am mobility challenged and disabled) Thinner? Yes, but having seen folds, and lack of transparency... Tape? Much better and lots of it Easy to apply? Yes, much easier, a window took 1/2 the time!

Funktioniert super