Model # V73/3H

Internet #100135637

Store SKU #450426

Store SO SKU #1000668546

Frost King E/O Indoor Window Insulation Kit (3 per Pack)

Frost King

E/O Indoor Window Insulation Kit (3 per Pack)

  • Designed for interior use on windows
  • Accommodates up to 3 standard sized windows
  • Shrinks with hair dryer & applies w/incl. dble-faced tape
$498 /each
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Frequently Bought Together

Product Overview

The Thermwell Products Co. Inc. Indoor Window Insulation Kit (3-Pack) provides shrink film to insulate 3 standard sized windows to help increase their R-Values up to 90% for energy-saving efficiency.

  • Designed for interior use on windows
  • Accommodates up to 3 standard sized windows
  • Each sheet measures 62 in. L x 42 in. W
  • Helps R-value increase up to 90%
  • Shrinks with hair dryer (not included) and applies with included double-faced tape
  • 3-pack allows you to insulate up to 3 windows



Product Depth (in.)
Product Height (in.)
Product Width (in.)
Unspooled Length (ft.)


Builders Hardware Product Type
Color Family

Warranty / Certifications

Manufacturer Warranty
1 year

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Customer Questions & Answers


Asked by: BUDDYFLY
The cord to my blow dryer can only reach as far as 18" from the window, so (see photo) when I installed this, I merely stretched it by hand, and then discovered that my blow dryer wouldn't get close enough to "shrink" it. But you can still see through it, and the shiny "wrinkles" that you see in the photo are from my shiny plastic sunflower curtain that is being reflected from the window. Also, you can see THROUGH it to the snowbank outside - - I will try to get a better photo when it is daylight outside.
Answered by: Songster
Date published: 2017-01-07

I have plants. Are these clear enough that sunlight can get throug? I don't want frosted windows.

Asked by: Sue
the film is 100% clear, not tinted. Does not interfere with light transmission, and I do not notice an UV rating on it.
Answered by: vajrock
Date published: 2017-01-09

Can't remove the backing paper from the tape.

The first side of the tape sticks well but I can't remove the backing from the tape so I can stick the plastic to the window.
Asked by: Patty
I found it easier to remove the backing while the tape was still on the roll, so I separated it a little at one end, and folded the backing under so that I'd have a way to pull it off after sticking it to the window frame.
Answered by: Songster
Date published: 2017-01-06

I do not have a wood frame around my window. Will it ruin my paint if I use just the inner frame of the window.

Asked by: Mich
if you are adhering this to PAINT, then yes, it might peel some paint off. There is no telling if it will peel paint, especially after being stuck for 3 months or longer. I have seen 1/4" of scotch tape peel paint off of an office door after a small note was hung for 1 day. But only 1 out of 99 times has it peeled paint off, and I suspect that this paint did not adhere well, obviously. Good luck.
Answered by: vajrock
Date published: 2017-01-09
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Customer Reviews

E/O Indoor Window Insulation Kit (3 per Pack) is rated 3.3 out of 5 by 60.
Rated 1 out of 5 by from Terrible - would not stick to some windows, and the ones that did stick would not come off in Spr... Terrible - would not stick to some windows, and the ones that did stick would not come off in Spring. Followed the directions but had terrible results, and now I am working very hard to get the adhesive off. The tape damaged the finish on some stained and urethaned trim. I strongly recommend buying 3M or Duck instead.
Date published: 2017-04-26
Rated 5 out of 5 by from A clean surface is the key I live in Upstate NY where the winters can be brutal. I have been using this product for several years now with great results. I have found that the key to successful use is that you must make sure the areas around the windows you are planning to cover must be absolutely clean and free of any kind of dirt, dust, grease or grime, including any cleaner residue. I have found rubbing alcohol on paper toweling works the best to do this. You may have to clean around a window twice, depending on it's location (i.e. a kitchen window). Allow a few minutes for the alcohol residue to dry up and the tape sticks very well. The savings I see on my heating bill are way beyond the cost of the product. Well worth the money!
Date published: 2013-01-24
Rated 5 out of 5 by from Drafty windows - No Problem! I live in an apartment with old, drafty windows. It gets ridiculous during the winter. Cold air just pours in through these windows. After applying this film which was a snap, no more drafty windows! This kit makes it easy and Home Depot has kits in all sizes to cover all applications. Thanks Home Depot!
Date published: 2010-11-14
Rated 1 out of 5 by from Cheap defective junk If you've ever done multiple windows, the procedure is tough. After completing five windows with the tape and film I then began to use the hair dryer to start the shrink. Then finding out that there was a split at the fold seam causing it to rupture a hole on every "completed" window. After inspecting the second film supply in the box the same split was evident. HD did refund but that doesn't make up for the time to tear off and redo with a better brand (from a different store). Do not buy this junk!!!
Date published: 2016-10-14
Rated 4 out of 5 by from No problems I went with this brand because it was the only one available. I had never tried this type of product before so I did some research before using it. It's important to make sure the area you will be applying tape to is clean and dry! I think some reviewers who had trouble with the tape may have skipped this step. I followed directions online by mixing equal parts water and rubbing alcohol and wiped down my window frames with this and let it dry. The tape was sticky, but not so sticky that I couldn't lift it off to reposition it. I put tape around the entire window and let it set about 10 minutes to make sure it was stuck well. Then I took off the backing, pressed the plastic sheet on the tape - starting from the top middle of the window and stretching to fit. You can lift and adjust the plastic until you're happy with the placement. Then I took the hair dryer and began at the edges, working my way around the window and then inward to the middle to get out all the wrinkles. Don't keep the hair dryer on any one area for too long or you could melt a hole in the plastic, keep moving around until it's tight. That's it! I just recently purchased this product and I've only done 2 windows - a regular size window and a large picture window. The regular window was easier and the edges are much smoother. The picture window would have been easier with 2 people, but I made it work by myself. Overall, this product is pretty clear after it's applied. There are some crease lines in the plastic that just won't come out no matter how much heat I put on it, but it is not that noticeable. I'm hoping that I will notice some difference in our utility bills, but then I'll probably be kicking myself for not doing this much sooner since it was so simple!
Date published: 2012-07-12
Rated 5 out of 5 by from Works GREAT!!! This product works fantastically!!! The double sided tape didn't stick that well at first then I wiped down the widow frame with ammonia and presto it stuck like... tape... Keeps my bedroom warm no more plugging in the heater all I need now is a blanket and I am Good!
Date published: 2010-12-13
Rated 2 out of 5 by from This product was 1/2" too short to stretch from the top of the window to the window sill. Fortun... This product was 1/2" too short to stretch from the top of the window to the window sill. Fortunately, this being my first time to use it, I started with a window that is shuttered at the bottom and has a valance at the top, so when I trimmed the excess from the sides, I used some of that to cover the little bit of exposed tape at the top, and then I used ordinary invisible tape to tape some of the excess from the sides to the bottom of the plastic so that it would reach to the tape on the bottom sill. Then I shut the shutter, so no one will see that I had to patch it at the bottom. Stretching from side to side, there were almost no wrinkles at all, so I barely had to use the hairdryer at all!
Date published: 2017-01-06
Rated 4 out of 5 by from Don't be scared off by the bad reviews of this product. I installed it on two windows today witho... Don't be scared off by the bad reviews of this product. I installed it on two windows today without any difficulty. I have a feeling that problems people are having with the two sided tape have to do with either installing it on a surface for which it isn't intended, or not properly cleaning the surface which the tape sticks to. I cleaned the woodwork surrounding the window with alcohol pads, and the tape is adhering just fine. A once over with the hair dryer to get the wrinkles out, and it looks great. I did, however, subtract one star because the backing on the tape is hard to get started when trying to peel it off. The corner of a razor blade helps to get the backing started away from the tape.
Date published: 2016-12-16
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