Portable AC Window Seal Kit for Casement & Crank Windows, 300CM/118" No-Drill Window Vent Kit, Adjustable Zipper Seal for Single & Dual Hose Portable Air Conditioners, Waterproof AC Window Kit
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Availability:
Only 10 left in stock, order soon!
Arrives
Friday, Aug 28
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Size: 118 inch
Features
- Fits Casement, Crank & Skylight Windows:Designed for casement, crank-out, push-out and skylight windows, this portable AC window seal kit fits window perimeters up to 300CM/118". A practical solution for homes and apartments where standard sliding window kits do not fit.
- Works with Single & Dual Hose Portable AC Units:The adjustable zipper opening wraps around one or two exhaust hoses, making it easier to vent different portable air conditioner setups. It offers more flexibility than rigid window panels with fixed hose ports.
- Helps Reduce Hot Air Backflow:By sealing the open window area around the exhaust hose, this AC window vent kit helps reduce warm outdoor air from flowing back inside. It supports more efficient cooling and helps keep your room more comfortable in summer.
- No-Drill Installation for Renters:No tools or drilling needed. Apply the adhesive hook tape to a clean, dry window frame, attach the seal, place the hose through the zipper opening, and tighten around it. Great for renters and seasonal use.
- Water-Resistant Fabric for Summer Use:Made with durable water-resistant fabric for everyday summer use. The flexible design helps create a neater setup than cardboard or tape DIY solutions and is easy to remove and store when the season ends.
Description
Will this fit my casement or crank-out window? Yes. It is designed for casement, crank-out, push-out, skylight and other non-sliding windows. Please measure your window before ordering. How do I choose between the 300CM and 400CM size? Measure the total perimeter of your window frame. Choose 300CM for up to 118", and 400CM for up to 157". Pick the closest larger size. Can it work with single hose and dual hose portable AC units? Yes. The adjustable zipper opening works with both single and dual hose portable air conditioners, as well as many dehumidifiers and tumble dryers. Do I need tools or drilling to install it? No tools or drilling required. Clean the frame, apply the hook tape, attach the seal, place the hose through the zipper, and close it around the hose. Does it help keep hot air from coming back inside? Yes. It helps seal the open window area around the exhaust hose, reducing hot air backflow and supporting more efficient summer cooling.
Product Dimensions: 1 x 1 x 1 inches
Item Weight: 7.8 ounces
Item model number: 3M
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Aug 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 118 inch
Reviewed in the United States on June 28, 2026 by CNK
Size: 118 inch
Works and looks great!!!
Reviewed in the United States on July 25, 2026 by Nbutterfly
Size: 157 inch
Held up in full sun for entire summer. If you shut off your ac when it is humid, the adhesive may release on one side. We found that reinforcing with weather seal tape addressed the issue. It gives enough extra that you can easily fit it in a window. I recommend installing from top to bottom and on the straightest part of your window first. It is not hard to install, but it depends on your ability to peel carefully and how well you have cleaned and prepared the area. It did a good job of keeping the heat out, but I recommend also purchasing an insulating sleeve for the AC unit inside to get the full benefit. It is the same thickness aso one of those stuff in a tiny pouch windbreakers. So it's thin, but does what it needs to do. Good value for the money.
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Reviewed in the United States on August 20, 2025 by Madelaine A Hackett
Size: 118 inch
Works perfectly for my older swing out window. I don't have central air and my room is upstairs so it gets pretty hot in the summer, too hot for just fans. I'd given up on using a portable AC because of the difficulty sealing off this type of window but this seal did exactly what I needed it to do. I highly recommend this kit!
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Reviewed in the United States on July 2, 2026 by Samm_Tot
Size: 118 inch
Got the wrong size but it still works for us so no need to return! Thanks
Reviewed in the United States on July 20, 2026 by Feride
Size: 157 inch
Seems to work, bar a few complications, but my cat can DEFINITELY escape though it if she ever got curious. Currently looking to invest in an acrylic panel with a hole for the hose to replace this but it works for now to test the new AC. (Just being very very aware of it and my cat.
Reviewed in the United States on June 9, 2026 by Lyndsey
Size: 157 inch
The one I bought was a bit too long. But it’s okay! Still functional. I bought this because the tape and box around my window didn’t look nice and it’s not weather proof. I like the flexibility of this item because if it rains all I have to do is remove it from the stick on Velcro and then re-apply again later if I want. Functionality: I like that it’s somewhat rain proof, and you can remove anytime and reapply if needed Stickiness: Make sure you follow instructions and clean your window seal well. Or else the Velcro adhesive will not stick.
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Reviewed in the United States on June 18, 2025 by Jaycee
Size: 157 inch
I have a casement window that opens from the bottom. I had just purchased this seal and I was having high hopes regarding this purchase, Even though I had read the review rating and it had not been what I was expecting. I was very excited to try this type of window seal, and when I tried to apply it, It took me over two hours. I love the idea of this design, but it did not work well with the application. Some say that it could be a user error when trying to apply the window seal, But after I had it in place, It started coming undone. It only lasted three days before the entire things started to unseal. I may be knew when it comes to these types of products, but it did nothing to drown out any noise coming from outside. I was able to hear the leaves when the wind blows, I could hear people walking, I could hear everything that happened outside. I had to keep my door shut to the space because I was afraid that anything that may hit the windowsill cause the contraption to fall. I understand that with a window seal, There’s going to be some sort of modification to the appearance of the room, but every time I had guest over, they always had to look at that window seal. To be quite honest, It’s not the prettiest of set ups and they appearance isn’t very attractive, but it gets the job done… Mostly. I still could feel on hot days that the air conditioning in the room was not cooling as it should, and I found out that hot air was coming in through the window seal. I like the fact that there is no magnets and that there is a strong adhesive. But it seems that the Velcro strong enough. Adhesive parts stuck glued to my window! So that was an absolute plus! They have Wonderful adhesive! The Velcro not so much. I wish they could revise this design because it is a wonderful idea just executed poorly.
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Reviewed in the United States on August 3, 2024 by Heather Dixon