IKSTAR Portable AC Window Seal Kit 400CM/157 for Casement, Crank-Out & Skylight Windows, No-Drill Window Vent Kit with Adjustable Zipper, Fits Single & Dual Hose Portable Air Conditioners
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Availability:
Only 10 left in stock, order soon!
Arrives
Friday, Aug 28
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Size: 157 inch
Features
- Designed for Casement, Crank-Out & Skylight Windows:This portable AC window seal kit is designed for casement, crank-out, push-out and skylight windows where standard sliding window panels may not fit. It fits window perimeters up to 400CM / 157" and offers a practical window vent solution for non-sliding window types.
- Fits Single & Dual Hose Portable Air Conditioners:The adjustable zipper opening works with single and dual hose portable air conditioners, making it easier to position the exhaust hose at different heights. A flexible portable AC window vent kit for a cleaner setup than rigid window panels with fixed hose ports.
- Helps Reduce Hot Air Backflow for Better Cooling:By sealing the open window area around the exhaust hose, this portable air conditioner window seal helps reduce warm outdoor air from flowing back inside. It supports more efficient cooling and helps keep your room more comfortable during hot weather.
- No-Drill Installation for Apartments & Seasonal Use:Install this AC window seal kit without drilling or special tools. Simply clean and dry the window frame, apply the hook tape, attach the seal, place the hose through the zipper opening, and tighten around it. A convenient choice for apartments, renters, bedrooms and home offices.
- Measure Before Ordering for the Best Fit:This 400CM / 157" window seal is best suited for clean, smooth window frames and seasonal portable AC use. Please measure your window before ordering to ensure the correct fit. A more adjustable alternative to cardboard or tape DIY setups for casement and crank windows.
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: 10.8 ounces
Manufacturer: Aappiness
Item model number: 4M
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
We just moved into a new place that has crank open windows and I must say I am satisfied with the quality durability and sturdiness of this product! The adhesive that they supply with it worse very good and the price was well worth it as well! It fit just like it should although I highly recommend you double and triple check your measurements! I would recommend this to my friends for sure
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Reviewed in the United States on August 17, 2026 by Terry komyanik
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: 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: 157 inch
Not easy to figure out how to use an ac unit in a window like this! We have an old house so these crank completely out. So both sides need to be sealed. It wasn’t difficult to install, just use the adhesive to apply all around the window frame and then velcro the plastic pieces together. It doesn’t look the most attractive from the outside but it’s better than dying of heat! There’s normally No leakage but if there is a heavy rain, the way it seals together on the top of the window creates a pocket… so it will start to get filled with water and can leak down the sides a bit. How to solve that is to raise it up making a pitch in the plastic so it drains off the sides so it won’t collect there. The zipper opens large enough to attach the hose through. It really is the best solution for this weird type of window. Ok, the only one! Haha
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Reviewed in the United States on October 14, 2025 by TrueJack
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
I purchased this product intending to use it for a window underneath a porch of mine, and I was disappointed. I liked how this cover can be used on a variety of windows without any drilling and how it was super easy to install, quite literally just plopping some double sided tape down along the window and boom, it works. Other than that, there is not much to say. Maybe this is just a me problem because I use it on the bottom floor, but it gets dirty really easily and is noticeable because of how white it is. The cloth seems very light weight and seems like it does not keep the cool air in very well, which is unfortunate. I quite literally used trash bags, and it worked the same.
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Reviewed in the United States on June 30, 2025 by Bertuchi Collosimo
Size: 118 inch
Works and looks great!!!
Reviewed in the United States on July 25, 2026 by Nbutterfly
2nd Update after 2 months of use - Downgraded from 4 stars to 1. The quality of these things are pathetic. I have it in a high use area but we literally just walk through it - no running, pushing big objects through it, etc. - and it has ripped a TON! There are holes scattered throughout the plastic and the side ripped where it attached to the Velcro in about a 2 foot section. The one we have in a less high traffic area has the holes, too, but hasn't ripped YET (I haven't had it quite as long so I am not holding my breath). I had to tape it up and now it looks terrible. I would expect these to last longer than a couple of months. They work for awhile but simply don't hold up. It's a shame, too, because as you can see below I loved the product so much at first I bought a 2nd one! Update - I actually am so happy with this product I bought a 2nd one. Too much cool airneas escaping from our bedroom when we propped the door open each night for our cat. Unfortunately if we don't leave it open she will scream at the door all night to have access so this is the perfect solution! Only drawback is sometimes she gets fiesty and runs full speed into the one we currently have and it is quite loud! Hopefully she won't this time but something to be aware of if you have pets. I am actually surprised at how efficient this thing is. I was afraid it would be so-so but it works pretty well. The Velcro used to hold it to the door frame is pretty strong and the magnets that hold the opening together are, too. Only reasons it didn't get 5 stars are: I got the clear one and it has this horrible, old looking lace detail along the top. I genuinely don't understand why. It wasn't mentioned in the product description that I could find and it is in the photo, but not very noticeable (especially on a mobile phone). It doesn't make the product less effective, just ugly. Second, the Velcro around the door frame peeled off in a section. We got it back up, but it didn't stick well at first. Third, it's SO LOUD. I suppose it makes sense, but when you are taking it down or putting it back up and adjusting, the noise is crazy loud. I wouldn't have even really paid attention to this previously, but I have a newborn who was woken up from a nap by it when my husband put it up one day.
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Reviewed in the United States on June 18, 2018 by Caleh100