Best Air Conditioner Window Seals of 2025

“I don't usually write reviews, but I must say that this is the highest quality insulation foam I've found on Amazon. I bought it to replace the cheap, thin foam that came with my Midea window AC. This foam is soft, thick, and bounces back as good insulation should. It has a smooth satin finish on one side and a more open foam texture on the other. I just purchased the 2-inch foam to complete the insulation around my AC unit. Great product!”

“I used this foam to block gaps and stop drafts, and it works wonderfully. It also keeps out insects. It's definitely better than usual foam—it looks nicer and performs better because it's thicker, easy to install, and fits perfectly where I need it, creating a solid seal.”

“I found this foam to be very dense and well-priced, and it matches the description perfectly. I’m using it behind curtain rails to block light from the ceiling since the sun rises so early in the summer! I will need to add some double-sided tape, but overall, it’s a fantastic item.”

"I had missing wings for my AC and needed replacements. These worked fantastically, keeping the cold air in my room. The adhesion is great, and I love that they're adjustable to any window."

"I replaced the curtains on one AC using the old slides. It was easy to cut and fit, blocking the morning sun perfectly. For my other AC, I used the plastic channel with self-stick tape, which was easy to apply and holds very well."

"After trying multiple applications, I found this product to be too thin for my window frame. Even with duct tape, it wouldn't stay in place longer than a few days. Stuffing paper towels worked much better for sealing the gaps."

"I decided to winterize my window AC unit this year instead of taking it out. I needed to block the breeze coming from the side accordions. The instructions were very easy to understand, and installing it was simple. It looks very neat and clean around the unit. No more breeze coming through, and the room is staying much warmer now."

"Since I have the security aspect already handled, I was hoping this would be my year-round upgrade answer for insulation. I've only just installed them, so I can't speak to longevity yet, but the design seems quite good. Just a tip: slightly over-measure as they recommend and take your time. Some steps seemed redundant, which made me double-check a few times. With a nice AC unit cover, the whole thing looks attractive as well."

"After two years, the adhesive is not sticking. It looks like I may have to buy covers every year and reapply. I'm unsure if I want to deal with that."

“I ensured the surface was clean with alcohol before applying it, and now I can easily seal drafty spots around my air conditioner.”

“We had to buy two because our AC was larger, but it fits perfectly and is invisible! No more bug issues, totally worth it!”

“I used this foam in my unheated mudroom to block cold drafts without damaging the power cord for my camera. It’s stiffer than expected but still worked well!”

"I was pleasantly surprised; this doesn't look like a typical purchase gone wrong. I let it sit flat for a bit, and after some adjustments, it's perfect. It even blended well with my decor and kept my husky from trying to escape!"

"While I was pleased with the end result, the installation was quite a hassle. I learned to lay it flat first and that cutting it bigger was a good idea. The tape was particularly tricky; I wasted some pieces initially. However, I opted for a three-piece approach which worked out well and left me enough material for a second unit!"

"I found this product incredibly effective at blocking noise from my busy street. It not only looks good but also keeps dust and critters out! Definitely a worthwhile addition to my home."

"I found the installation to be very straightforward, and the product looks great. However, I noticed that after just a few months, it started to turn yellow."

"The instructions provided were not helpful, and the installation was a bit tricky. Once I figured it out, it was easy, but it took me over an hour initially. It works well once in place, but I might consider other options next time."

"I used this product to darken my child's room around the A/C during the summer. It's pretty basic but does help with the temperature."

"I was thrilled with how easy this was to install. It held my AC exhaust hose securely, and I loved that I could easily undo the velcro to open my window when needed. It's not the best insulator, but it definitely did the job for me."

"After a summer of use, I found this product to be very effective. It fit my horizontal sliding windows perfectly, and I appreciated the heavy-duty material. The only downside is that I might need to replace the adhesive next season."

"This has been a great solution for venting my 3D printer. I can easily attach and detach the hose as needed. However, I did notice that the velcro stitching isn't as strong as I hoped, so I'll need to keep an eye on that."

"I found installation to be very easy, and the product matches its description perfectly. I loved it!"

"I got this product after my cat damaged the original AC siding. Installation was straightforward, and while it was intended as a temporary fix, it's been holding up well for over 6 months. It does its job keeping the elements out, but it can be challenging to clean."

"I had several air gaps around my window AC unit, so I needed more insulation. This product provided more insulation than I needed, and the material is thick and durable. After installation, I've definitely noticed less heat entering my room."

"I found the material sturdy and well-insulated. It was easy to cut with scissors, and the instructions for sizing were really helpful."

"While the product worked for me, I wish the tape wasn't so gummy. I ended up using my own tape to seal it."

"I was a bit surprised by how thin the product was, as I expected something stiffer. The double-sided tape provided was a challenge, as it felt like jelly and stuck to itself."

"I found it incredibly easy to trim and install. It covers all the little gaps perfectly, making everything look nice and neat. I was frustrated with foam strips that stuck out and didn't do a great job, but this cover is the perfect solution. The adhesive tape is very sticky, keeping everything in place well. I highly recommend it!"

"Living in a noisy area, I appreciate how these panels help with sound insulation. My window unit used to let in a lot of noise starting at 7 AM, but these have made a significant difference. They also block out light, which was waking me up. I found them easy to install and keep in place, and I've been really glad to have them this summer, planning to use them again next year."

"This product is exactly what I needed for insulating around my window air conditioner while also keeping tiny bugs out! It looks nice too, and I think the price is great. I'm really satisfied and would definitely recommend it to others!"