Best Air Conditioner Window Seals of 2026

"I was impressed by how simple it was to install this cover, even with my unit high up on the wall. The universal fit made it a bit bigger than I needed, but with some tape and string, it fit perfectly. No more cold air sneaking into the garage—and for the price, it’s absolutely worth it for the winter."

"This cover wrapped snugly around my air conditioner thanks to its adjustable straps. The quality feels solid and it's waterproof, just as described. My room is noticeably warmer now, and I'm glad I made the purchase."

"I have an unusually narrow air conditioner, so I had to get a bit creative for a proper fit. The cover fits well with some rigging, but the material is a bit thin and there isn’t a full panel on all sides. Still, it does the job for standard windows and keeps drafts out."

"My bedroom was freezing, even with a window shrink wrap kit. After I applied this tape over the plastic, I could actually feel the heat when the heater turned on. It made a huge difference—I absolutely recommend it."

"I used this tape to seal the wing windows on my garden window. The adhesive is very strong—just make sure to wipe the surface first. After application, I haven’t felt any drafts at all. This is a solid product at a good price."

"I tried this tape around my patio doors and air conditioner. It’s super sticky and stays put easily. Since using it, I’ve noticed no drafts coming through. I’ll check for any residue in the spring, but so far, I’m very satisfied."

"I'm an older woman and was able to put this window film up by myself without any trouble. It really helped block the cold air from my leaky window, and you can barely tell anything is there. I’d recommend it to anyone with drafty windows!"

"I was impressed by how thick and sturdy this insulating film is—it feels much stronger than others I’ve tried. Installation was simple, and once up, it completely cut down the drafts in my old windows. My rooms are much warmer, and you can barely see the film once installed."

"If you have pets, this stuff is a game-changer! My cat launched himself at the window and only managed a small tear, which I quickly patched. Other window films would have been shredded. For pet owners dealing with drafts, this is the best option I've found."

"After struggling with DIY foam for my air conditioner and dealing with chilly New England winters, I tried this kit. Installation took about an hour and a half, and the snug fit completely blocked out drafts. The foam is a bit tricky to cut perfectly, but with a utility knife and patience, it looks much better than my old setup. Worth the price for real insulation and a cleaner look."

"My second-floor home office used to get really drafty in the winter, even with central heating, because of the accordion sides on my window AC. This product was very simple to install and immediately stopped the drafts. Now my office stays warm, and I’d recommend this for anyone with a window unit."

"My husband thought we’d have to buy a new window AC after we broke the original surround, but I found this and it saved us a lot of money. It was easy to adjust and cut to fit, and now it keeps both air and bugs out of the garage. Great value and functionality."

"I've always put off covering my in-wall AC during winter, which made my house colder and drove up my heating bills. With this cover, no more freezing drafts—it fits perfectly and shields the room. I appreciate the reusable foam layer and the tan color that hides dust over the winter months. Really happy I made this purchase."

"This cover fits my large AC unit just right and has held up to strong wind and rough weather without any problems."

"I found it very easy to put up and it makes a noticeable difference keeping out the cold. I definitely recommend it!"

"I found this cover to be very easy to install and it fit my small air conditioner perfectly. Since using it, I've noticed it keeps out the cold much better."

"Honestly, I was hesitant about the cost, but this cover is beautifully made, fits my unit well, and the Velcro tabs make it secure. It's well insulated and worth every penny—highly recommend it."

"The cover is a quality product for winterizing air conditioners, but I did notice it's a bit easy for bugs to get in through vents or small gaps. Still, it does its main job effectively."

"I absolutely love this foam! It's both sturdy and flexible, and the density makes for a very secure seal wherever I put it. It stays in place and does exactly what I need."

"I bought this foam to seal extra gaps on my new AC, but ended up not needing it since the unit came with enough. However, the quality feels great, so I'll definitely use it for future projects."

"This foam is perfect for blocking ants and earwigs from sneaking in around my sliding window ACs. After installing it, I've noticed a big improvement in keeping pests out."

"I'm really impressed with how simple and quick the installation was—I didn't even need special tools. The panels are adjustable and sturdy, fitting snugly in my sliding window. Plus, the seal made my AC cool the room much faster and more efficiently. Highly recommend for anyone looking to boost their portable AC's performance!"

"Honestly, this kit was a total game-changer for my summer comfort. I’m not handy at all, but the setup was a breeze and the instructions were easy to follow. It’s surprisingly portable and the adjustable features mean I can move it wherever I want. It won’t cool a huge space, but it’s perfect for my apartment and runs quietly, so I can watch TV without turning up the volume."

"The kit fit my old LG portable air conditioner perfectly—no need to cut anything, and it was super simple to connect to the window. My previous setup always fell out, but this one stays put, and I’m really happy with how well it works!"

"I'm really pleased with how easy these covers were to install on my window units for both my travel trailer and cargo trailer. They're a bit larger than I expected, but the quality and durability are outstanding. Even after driving on the interstate, the straps and covers stayed put. In Arizona, keeping the heat and dust out is a must, and these covers do the job at a great price!"

"As someone who has trouble moving heavy window ACs each season, I was relieved at how simple it was to put these covers on. Installation took just minutes with a step ladder, and the straps gave me a snug fit. After a harsh northeast winter, the covers still look brand new. Leaving my ACs in year-round is now possible, and these covers have made that change easy for me."

"I needed something to block drafts from my wall AC, and this insulated cover folded perfectly to fit my unit. The insulation is great—no more cold air sneaking in. It's clearly well-made and effective at keeping my room comfortable."

"I found these panels super easy to trim and adjust, and they held themselves in place just by friction. No need for the frame in my case, which was really convenient."

"The panels fit my large bedroom windows perfectly and needed no modifications. However, I had a tougher time with my living room windows, but overall, they're simple to use, even for someone who isn't handy."

"While the foam quality is great and the product does what it claims, be aware that you still need your original frames for proper installation. The photos can be a bit misleading on that point."