Gruntbear Universal Window Seal for Portable Air Conditioner, Portable AC Window Seal Kit, Hot Air Stop Air Exchange Guards with Zip and Adhesive Fastener Works with Tumble Dryer (400cm/157inch)

I was so relieved to find this so I could use a portable AC with my stupid crank windows. This thing is really simple to use and gets the job done. Only complaint is that the Velcro isn’t super sticky: I had to reinforce it with duct tape in several places. Not the end of the world though and still highly recommend if you need to make a portable Ac work in stupid windows

My expectations weren’t high, I have to admit, but this thing worked great on my outward rolling-old type casement windows, much better than I’d even hoped, I can even close and latch the window with it completely still installed. Don’t know about durability yet, the installation wasn’t as bad as I had imagined either. A great answer to casement windows of any type. Mine were 17” wide and 47” tall.

Other than the cheap glue to hold the velcro onto the window this product works well and is very easy to install. My house was built in 1961 and almost all the windows are original and kind of a weird design but I had no problem with the install. However, where the AC hose vents out the velcro popped off from the weight. The glue really doesnt hold up all that well. Otherwise a useful product which pretty much solved my AC dilemma.

Not as described. Doesn’t show in pictures that it tapers which didn’t work for my larger opening even though under the size they mention. Velcro tape already peeling off a very clean flat surface. Junk really.

This was perfect for our window and portable AC. Now unfortunately my window was not exactly like the one in the picture and can open in a way that is split but I found a way to Jerri rig this to fit my needs perfectly.

I have crank windows(that open outwards) in my new apartment so it has been very hard to use my portable AC in my bedroom. Using this window seal has been great so that I can keep the cold air in and warm air outside during use. I did have some trouble putting it up myself though since I am short and the window is above my regular reach. I had to have someone else help me install it. No other issues so far though.

Works for my window that opens outward. No idea about longevity. Why pay more If you dont have to

I didn’t find the GRUNTBEAR WINDOW SEAL as easy to install as marketed – but then, again, I’m that kid who put square pegs in round holes. My installation dilemma was that my horizontal window cranked outward, positioning the actually opened window pane on the exterior of the house as opposed to inside the house; and the user’s guide and instructional video on this Amazon’s product page, demonstrated installation with the window extended inside the home. Nonetheless, after a few trials and errors, I was able to install the seal sufficiently enough to prevent air and flying insects from entering the house. The GRUNTBEAR WINDOW SEAL was adorned with dual zippers that allowed for four separate openings; meaning that I was able to provide an opening for the air-conditioning hose outlet with one set of zippers, and the crack on the window with the other set of zippers. The package also included enough adhesive velcro tape on the roll to complete the installation with tape remaining, and both sides of the tape were forgiving; I had to reapply a few pieces of tape several times in order to maneuver the correct placement, and the tape’s adhesive did allow for those initial mistakes and replacement. I was also able to open and close the window, with the seal intact. The nylon material of the GRUNTBEAR WINDOW SEAL appeared sturdy, and perhaps waterproof, but it hasn’t rained since I installed the seal to test that premise. Overall, I appreciate the design of the seal, and once I figured out the configuration of the installation, the appearance was definitely much more appealing than a cardboard insert, from inside and outside the house. I anticipate being able to use the seal for several summer seasons and the nylon appeared machine washable. I did, however, miss the step to secure the zippers with the included zip-ties, but the zipper remained in place without the ties anyway.

Good product and fast delivery.

originally i bought the 300 cm bc my son said it was small casement window but after it was measured, realized needed to 400 cm one so quickly ordered the longer one and returned the smaller one. see photo of how it works with outward swinging casement window. can’t really comment yet on durability but so far works well enough to keep bugs out and cool A/C in