HEMRLY Sound Proof Foam Panels Self-Adhesive 12 Pack, 1.5" X 12" X 12" Acoustic Foam Soundproof Wall Panels, High Density Acoustic Foam Panels for Home Studio Ceiling (Black+Blue)

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Wanted cheap panels because i wasn't sure how neccessary they would be to insulate sound on a shared wall between my office and the bedroom of my wife who works nights and we're looking to move soon. Seems like decent foam and the adhesive on the back made it easy to apply to wall but about 4 of them were half or completely flat so i only got about 60% of what i ordered. But couldn't find a better price for the color and quantity i wanted.

I ordered 6 packs of these for a total of 72 tiles. After opening the packs and paying them out for 48 hours, not one of them fully expanded into shape. Every single one of them require help by pinching and pulling the peaks to extend, which is very time consuming and gets hard on your fingers. Those that do extended look great, even if they aren't quite perfectly square. The adhesive is good and installation is easy. But of the 72 panels, 28 of them are completely unusable. They didn't expand enough to help along with the pinch and pull. And on about 10 of them, the adhesive fell a full inch short of one edge. The instructions offer the method of soaking them with a spray bottle and using a hair dryer to help them puff up. I tried this on 2 tiles to no avail, and the water seemed to diminish the adhesive. The whole experience with these is very frustrating, but I bought them in packs of 12, so I'm returning the defective ones in bunches of 12 (sorry if a couple are damp). I'll need to buy another bunch of 72 to finish the job. So, my advice: be prepared to be very hands-on with each single panel, and buy twice as many as you'll need. Maybe you'll get enough good panels to do the job and you can return the almost half that will be defective.

Ordered 2 sets of black and blue combo and allowed them to decompress for 48 hours. Many of the black panels puffed up within a day, but only 4 out of 12 blue fully decompressed. Out of 24 total panels, 5 blue are partially flat, 3 remained fully flat and 3 black are also partially flat. That's more than half defective!I bought these because they were reasonably priced, had decent overall ratings, and the full adhesive backing is great, but I can't use half of what I ordered to soundproof as planned.

I ordered 2 packs of the black and blue ones.. I don't know if it was my packs but the first one only 1/2 of them came out to full size and then I tried the water trick as described because they didn't fluf and not only did they not fluf the adhesion was all messed up when I tried to even apply them 1-2 sort of recovered.Out of 2 packs of 12 I have 10-12 that were usable we tried water in a spray bottle and a hairdryer. Adding a lot of water and pinching the foam up and hairdryer. Tried getting a few damp and throwing in the dryer.. The second pack also had the backing cut incorrectly so some of the foam was not covered with adhesive and some were cut oddly. Out of 2 packs about were useable.. Im super disappointed.

Works Ok.I use them for my kids who are gamers. They definitely need to be a bit more dense. They’re a bit flimsy and seem very easy to wear and tear.

Only 3 of them puffed up all the way! As for the rest, some didn't puff up at all and others had half the square puff and the other half stay flat. When I took them out of the box I left them for a few days then tried the water and blow dry instructions. I don't know how noise canceling they are cuz I never hung them seeing as they look so dumb with most of them being flat and half flat. I'm bummed because I really wanted them to work and look nice in my son's room. (Last picture is one of the 3 that fully puffed up)

some of them came smashed and they didnt puff up again.