3M Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6)

The film is very thin and can easily get pierced by sharp object if not careful. Has to be installed at least an inch away from glass pane to be effective.

Lo compré porque decia que el paquete llevababa con dos rollos de cinta. Mi paquete solo tiene una. Era la razon que habia comprado el kit... No podia encontrar solo la cinta. Y ahora, no tengo suficiente para hacer la faena.

I cannot compare to any other year, as only been in this property this winter. I'd heard previous people had had high heating bills, so used this to add to my being efficient. I plan to leave it on all year, for as long as possible. I can comment on application. Yes, a bit of a fiddle, but, do the cutting as best you can,. I laid mine out on clean table, measured, dabbed blacker pen dots to guide my cut. When applying to window, I also carefully cut sticky tape to shape to pass by the window handle section. It worked. The film still adhered tightly. The hairdryer works brilliantly, I scoped the hotair to and fro over the film and stopped when it was taut, not over-taut. After a few weeks, the film attracts a very fine deposit from the atmosphere. Wipe with dry cloth. You really only see this if sun shines directly on it. I watch birds thru this filmed-over window, and it is nearly 100%clarity to look through with binoculars. 1.5 year later update: took it all off, it started to attract tiny black harvest flies behind it. I am impressed it did the job for far longer than I thought it would. A side bit of fun was - when a fly tries to get to the window glass it poings off the plastic like it is bouncing off a trampoline. My old stone house has been insulated now so I may not use this again.

This really works! I have an old 1940s home in Victoria with the old sash windows. You could feel the chill coming through them and our heater would run constantly throughout the day, never reaching 20 degrees. If I didn't put a timer on it, it would never turn off! I read a casestudy on this film via the Victoria Sustainability website and it said it does help reduce chill and retain some heat so I thought I'd give it a go. I'm glad I did. Installation is relatively easy. The tape is forgiving so you can pull off the film to restart as you install. I have shutters on the sash windows so the film is completely hidden on the inside, meaning I didn't have to be perfect when sticking the film down. From the outside, you can't even tell it's installed. note: the film doesn't go onto the window glass, it's supposed to stick on a frame, so there is a gap between it and the window glass, essentially acting like double glazing. You can immediately feel the difference. The chill from the windows are gone and my heater is actually stopping now because it reaches the thermostat temperature! I'm already saving money. I expected some effect, but it's surpassed my expectations. Highly recommended!

Follow the instructions and sealed up my window, perfect solution to keep the heat out of the window.

I bought this kit 2 winters ago. We have a ranch house on the side of a mountain and it gets very cold. Combine that with really crummy old windows and our house was freezing. Not good when you pay for home heating oil!!! It was so bad at one point that when it was windy outside, I actually witnessed the drapes in my house billowing into the room. That is when I decided to purchase this kit. I actually got 2 kits to make sure I could finish all the windows in my house, and I ended up having plenty left over. I installed the double sided tape and stuck on the plastic, used the blowdryer to warm it up and shrink wrap the windows, and I was done. No more draft or chilly rooms! You are supposed to take it off after each winter but I have left it on for 2 years now. I find it also keeps my house cooler in the summer. Combined with thermal drapes, you have a combination for energy savings. PROS: - sticks great and lasts for a long time -once you get the hang of it, its easy to install -really has saved us money on home heating oil CONS: - if you don't totally shrink the plastic, you can see the ripples from the outside of the house and it looks a little messy, but if you do it right it is crystal clear -it is awfully hard to get the double stick tape off if you leave the product up for a long time We are now going into our third winter with the same kit on our windows and we are only now noticing some of the windows are losing their plastic in some places, peeling etc. But thats to be expected when its only supposed to be left on for a shorter period of time.