



❄️ Seal in warmth, shrink out the chill — your windows’ new best friend!
The Thermwell V8425 Shrink Wind Film Window Kit offers a clear, heat-shrink plastic film that insulates up to three large windows or doors. Made in the USA, it installs easily with double-sided tape and a hair dryer, providing an invisible barrier that reduces heat loss and lowers energy bills. Lightweight and backed by a 1-year warranty, this kit is a top-rated, budget-friendly solution for winterizing your home.

| ASIN | B000AXXD7O |
| Batteries required | No |
| Best Sellers Rank | #298 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Weatherproofing Window Insulation Kits |
| Brand | Frost King |
| Color | Clear |
| Customer Reviews | 4.3 4.3 out of 5 stars (16,612) |
| Global Trade Identification Number | 00077578040431 |
| Included Components | Woodworking Project Kit |
| Installation Type | Heat Shrink |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | V8425 |
| Manufacturer | Thermwell Products Co., Inc |
| Material | Plastic |
| Number of Items | 1 |
| Product Dimensions | 1.8 x 1.8 x 47.5 inches |
| Size | 84" x 25' |
| UPC | 077578040431 |
| Ultraviolet Light Protection | False |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year. |
B**A
Helps Warm the House
Very inexpensive way to help warm the house. The films really make a difference! It is a bit challenging to peel the tape, though. I found ripping it a little helps.
C**.
Lower your power bill
Every window in every home should have over your window. Double sided tape is very sticky.one you a ply heat and it shrinks and tightens (used hair dryer) can't even tell its even on. KEEPS THE COLD OUTAND THE HEAT IN.
A**R
Works great.
3rd or 4th time ordering. Helps seal old drafty windows. Easy application and very transparent
C**G
Solid product
I noticed a difference in my winter electric bill. I'd like to know if these help keep the A/c in amd heat out in summer. There's no mention on the package. I'd still replace them every year. It's doable for 1 person, but very easy for 2. My son and I did 5 windows in 30 mins.
H**.
Good Quality and Easy to Use
The package came with everything I needed (except a hairdryer and my husband). The tape was easy to put on and the film came at the perfect size for my windows. It has kept the cold out of our house.
B**N
Thin plastic
Plastic is flimsy, tears easily. Tape isn’t the greatest - not very secure on wood window sills (in an older home). However, the precut sheets are so easy to work with, to stretch across the windows. Not so great keeping out the cold - I wish the plastic was thicker. First time user, not sure we’d purchase again for next winter.
J**R
Stops drafts cold.
Its cold in the winter where I live and my windows are old and drafty. These dramatically cut down on heat loss by about 10 degrees in our house. They work great and are well worth the money in my opinion. Theres plenty of tape and if you know how to run a heat gun or a blow drier this instal couldn't be simpler. Have bought every year for about 5 years and will continue to do so.
M**R
Frost King
Ordered two boxes of nine. The first box had a roll of tape that the backing on one side of the tape had green lettering that I think said Frost King. Those nine went on with absolutely no problems and I would give it a five star. The next box roll of tape had no green marking on one side of the protective material on the roll of tape and it was a disaster. It kept peeling off of the window and would not stick like the first one that had the green markings on the tape. Just be aware, green markings on the protective sides of the tape thumbs up, no green marking on the tape, disaster. Looks like product made in China, some company in China came by Frost King's office in China and sold them a bill of goods on their tape versus the first tape. Frost King, they're not the same! First box five stars, but unfortunately I'm going to have to give them a one-star because of the tape in the second box.
A**V
Good, strong film that makes quite a bit of difference and is (relatively) easy to apply. The only drawback is that the way the sheets are cut can result in a lot of waste, depending on the size of your windows. I probably wasted a third to a half of each sheet. Also, the creases in the folds remained, which means that the film is visible. That doesn't bother me, but it may be an issue for more aesthetically-minded people.
C**N
ok
K**Z
J'ai suivi exactement les instructions mais le ruban adhésif double face ne maintient pas le film en place tout autour de la bordure, nous ne pouvons donc pas obtenir le plein effet de l'isolation. C’est domage.
T**G
TLDR: After using this product to secure my home, my energy bill dropped significantly I moved into a small 20 yr old townhome in Nov 2019, around 1500 sq ft. I was surprised to get my first heating bill (I live in Richmond BC, by gas via Fortis BC). It was way beyond any utility bill I have paid. A year later I decided to install this window insulation kit and you will see in my attachment that my energy used dropped signifcantly. To put things in perspective, remember that in 2019/2020 Jan and Feb it was still ok to go to work and travel so we were barely home and I had the heat down during the day; whereas 2020 we are home all day and needing heat as well. The average temp for both years were 5 celcius in January 2019 and 2020 with 4 celcius in Feb 2019 and 5 celcius in Feb 2020. Overall, I highly recommend this product to those who want to insulate their home better. Especially those that are older with single pane windows.
D**F
Have tried a few brands of this kind of glazing film - and this is the best by far. Best tape and best film. Have seen a rebranded version of this in the UK, but can't recall the name. Other versions have sub-standard tape where the film comes un-stuck quickly.
Trustpilot
1 week ago
1 month ago