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Indoor Window Insulation Kit (3 per Pack)

$492
  • Designed for interior use on windows
  • Accommodates up to 3 standard sized windows
  • Shrinks with hair dryer & applies w/incl. dble-faced tape
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Price:
$492

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
  • Click here to learn more about Eco Options and Energy Efficiency

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
0.003
Product Height (in.)
62
Product Width (in.)
42
Unspooled Length (ft.)
5

Details

Builders Hardware Product Type
Weatherstrip
Color Family
Multi
Color/Finish
None
Density
0.00
Interior/Exterior
Interior
Material
Other
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
1 year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 3.5
    out of 132 reviews
  • 58% recommend this product
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Showing 1-30 of 132 reviews
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!
by
    • Recommended
    1 person found this helpful
    Buy it every year. Easy to use. Lasts all season....
    Buy it every year. Easy to use. Lasts all season.
    by
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
      by
      • Verified Purchase
      Really does a great job with keeping the cold out...
      Really does a great job with keeping the cold out and the warmth in. Also magnifies the sun coming through the windows, so it is extra warm on a sunny day- great in the winter! Don't follow the instructions, though. Start from a corner and work horizontally and vertically at the same time, pulling the plastic really tight as you go.
      by
      • Verified Purchase
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
      by
      • Verified Purchase
      One came half torn down the middle. Very low quality....
      One came half torn down the middle. Very low quality.
      by
      • Verified Purchase
      by
      • Verified Purchase
      Does great job sealing windows...
      Does great job sealing windows
      by
      • Verified Purchase
      After 1 week of it being up on all of...
      After 1 week of it being up on all of our windows, every window except one started coming apart at the tape. The double sided tape they give you clearly lasts about 1 week. I would say do plastic on the outside of your windows instead, because this crap isn't worth it.
      by
      • Verified Purchase
      Works good! Wish I had thought to get it...
      Works good! Wish I had thought to get it sooner. Saved money this past month and that was during the coldest part of the winter. Would highly recommend it!
      by
      • Verified Purchase
      Works well to maintain heat inside the apartment...
      Works well to maintain heat inside the apartment
      by
      • Verified Purchase
      by
      • Verified Purchase
      by
      • Verified Purchase
      Good quality, easy to assemble. Keeps room warm....
      Good quality, easy to assemble. Keeps room warm.
      by
      • Verified Purchase
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
      by
      • Verified Purchase
      This kit was easy to use with very specific & easy to follow directions! It has made my home offi...
      This kit was easy to use with very specific & easy to follow directions! It has made my home office much warmer for me!
      by
      • Verified Purchase
      • Recommended
      It was easy to use and has kept the draft...
      It was easy to use and has kept the draft out nicely. The instructions were clear and easy to follow. I have been very pleased with the product.
      by
      • Verified Purchase
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
      by
      • Verified Purchase
      Very good product. Easy to use. Works well....
      Very good product. Easy to use. Works well.
      by
      • Verified Purchase
      Thinner and lighter than I remember it used to be....
      Thinner and lighter than I remember it used to be. It worked out tho
      by
      • Verified Purchase
      Easy to install ... instructions straight forward and it did...
      Easy to install ... instructions straight forward and it did insulate as expected ... ha used these in my previous home and will continue to use.
      by
      • Verified Purchase
      Have bought this product for years.This batch was terrible quality….lines...
      Have bought this product for years.This batch was terrible quality….lines across the product so not clear and unnoticeable like before.I intend on calling Frost King to complain.
      by
      • Verified Purchase
      After placing on my windows, it made a noticeable difference in the temperature in the room.
      After placing on my windows, it made a noticeable difference in the temperature in the room.
      by
      • Verified Purchase
      • Recommended
      Cheap Tape
      The price was right, but this was a terrible purchase. We bought a competitor brand that was more expensive and didn't think that there would be much of a difference. 100% wrong. The plastic is thin, but otherwise fine. It really came down to the tape, which is garbage. It was a complete waste. We followed instructions, cleaned the surface (plastic) with alcohol. Within a month, there were breezes on all the windows because of the tape. We ended up replacing all the windows with the Duck brand insulation (both the regular & Duck Max). The tape is so much better. The plastic was about the same. But if you get the Duck Max, the plastic sheeting is thicker, if that's what you're looking for. Tape appears to be the same on both products. Spend the extra money & save yourself time in the end.
      by
        Rating provided by a verified purchaser...
        Rating provided by a verified purchaser
        by
        • Verified Purchase
        Works well to stop drafts in old windows....
        Works well to stop drafts in old windows.
        by
        • Verified Purchase
        This does not stay on the windows. Keeps peeling up....
        This does not stay on the windows. Keeps peeling up.
        by
        • Verified Purchase
        Works great and easy to install, night and day difference...
        Works great and easy to install, night and day difference to how much draft there is.
        by
        • Verified Purchase
        Too thin to insulate
        This plastic does not work. I covered all my windows in my home with this kit and when I open my blinds we can still feel the draft from the windows.
        by
          It was a difficult job because of the window's location....
          It was a difficult job because of the window's location. I was concerned that I was going to melt a hole in the plastic membrane. It works pretty well. I may take the hair dryer to it again before it's all over.
          by
          • Verified Purchase
          Showing 1-30 of 132 reviews