REDTRON 400CM Universal Window Seal for Portable Air Conditioner And Tumble Dryer, Works with Every Mobile Air Conditioning Unit, Hot Air Stop, Easy to Install(No Need for Drilling Holes)

This is just the job, my windows are side opening and I needed something to seal the gap. This is easy to install, the velcro has strong adhesive and there is enough on the roll. Just make sure you get the zip on the correct side. No need to trim the material, there may be some left unused as such but ir makes no difference.Photo one is from the outside and photo two is from the inside.Definitely worthwhile to make the air-conditioning work effectively.

It works well, stops bugs getting in and the cool air getting out which is what I want it to do. Was quite tricky to install as the picture's are not clear, but it still doesn't take too long. Only issue I have with it is that you cannot open the window with it attached unless you completely detach the velcro around the whole window, which is not ideal, but otherwise is very good

These are okay for the job but do not fit windows well.The glue used on the velcro strip is an absolute nightmare when it comes to removal. Had to use strong adhesive remover and that barely had any effect.Be prepared for a lot of work removing these once installed.

Very good quality, easy to install,worth it ,

Watch a YouTube video first then give this a go. It's pretty easy

This product is garbage. The glue does not adhere strongly enough and the product detaches from the window within a week or two. Very poorly made.

Just what I needed, I have a bedroom window that needed sealing to increase the efficiency of my air conditioning in my bedroom. I noticed when temperatures were going above 30 degrees C outside and my air conditioning was on full power I would put my hand near the curtain where my exhaust and inlet hoses were routed, and I would feel a warm blast of exterior air trying to make its way back in the room that I had just spent an hour getting down to 22 degrees C. After installing this I noticed this problem had been eliminated and the room cools quicker than before and when the next heatwave hits, I'm sure I will have an even cooler room. Installation looks daunting at first, but trust me! just do exactly as the little instruction leaflet says and after you just put the sticky Velcro tape around the window frame and the window its self it will then make complete sense when looking at that cloth. It has a nice quality feel to it. Good product. You might want to air it out a bit after opening it as it has a chemically industrial smell to it which dissipates after a short while, but no biggy.

Product is good, does the job but it's fiddly to install. Bought it thinking I could set it up quickly and easily and it turned into a bigger job than I was expecting.Once up it does the job.