36 Packs Acoustic Foam Panels Pyramid 2"×12"×12" High Density Sound Proof Foam Panels for Walls, Noise Cancelling with 180 Pcs Double Side Self Adhesive

I bought this to reduce outside noise pollution in my old apartment with poor window and door seals. I was skeptical and not expecting much, but I had to try something. The foam itself seems high quality and is very thick. Yes it took some time to fully expand, but it did expand. No the smell isn't great, but that's how foam smells and it goes away quickly. The adhesive pads included worked very well on every surface I tried with no pretreatment. I tried them on glass, metal, and painted surfaces. I was able to cover my entire bedroom window, the frame of my front door, and the edges of my balcony door where there were gaps. It has reduced the sound inside noticably, especially in the bedroom where I used the most foam. On my front door I used a staple gun to ensure the pads won't come off with opening and closing the door. Now the only sounds that come through are the horn of the nearby train, and the annoying straight piped pickup trucks everyone seems to have in my area. But both are still reduced enough to be livable now. It's nice to finally relax in my own home. I'm strongly considering buying more for my home office and the rest of my front door, it was worth the money spent so far.

Great quality, a bit expensive, but if you are serious about sound proofing - YOU NEED TO BUY THESE.

I used them to cover the windows of my house since it’s my frats party house. The sound proofing really didn’t want to stick to the poster board backing but they work great and look sick.

Minus one star for this product being advertised as SOUND PROOFING panels, and using this term synonymously with ACOUSTIC panels in their product description. They are not the same thing. These provide next to NO value as sound proofing because that's not what they're really meant for, and is the source of most negative reviews for these and many similar types of panels on Amazon. They are ACOUSTIC panels, meant to remove unwanted echo and reverberation from a recording space, and NOT meant to insulate sound. Do not buy these if you are actually looking for sound proofing.Minus another star for how THIN these panels are. I bought some acoustic panels a few years ago, and wanted to add some additional panels to the room, and these are literally half as thick as the ones I bought previously. I think this is essentially "shrinkflation" for foam products generally, as every other acoustic panel I looked at had this same sort of complaint in the reviews.Other than that, these still work well enough for their intended use - cover your walls with them, and it will still remove any echo or reverb in the room just fine.These come in a vacuum sealed pack like most other similar panels, however these also come in a box, which prevented the panels from getting banged up during shipping - I had no issues with smashed corners or edges on any of the panels when they re-inflated. They also popped back to full size almost immediately, no need to dunk them in water or wait days for them to breathe, they were ready to install right after removing them from the packaging. They also didn't leave a strong chemical smell in the room for days, like other similar panels I have bought in the past. I also appreciated that they were a uniform size, I had real problems with my previous panels all being slightly different dimensions and making it really hard to cover the walls symmetrically. Do note these do NOT come with any way to actually stick them to the wall - I just used a staple gun with black staples though, and it looks great!

This product is absolutely garbage....Amazon made it look like professional sound proofing and it's far from it. Panels are thin, don't absorb any sound, have a weird smell, and adhesive doesn't stick to them at all....highly disappointed in Amazon from my last couple of orders so I'm not sure if I'll be ordering anything from Amazon anymore

got these for my garage door to help with sound when we're practicing. we feel it made a difference. it doesn't lessen the sound getting through to outside but it definitely helps with being able to hear each other when we're practicing. had no problem with smell or them even expanding. the second i opened the plastic they expanded to 10 times the size. just wish i had bought more.

These panels expanded almost instantly once out of their packages. I had one that didn't but it only took a few hours or so to return to fully size. They came with so many adhieve stickers I have more then I needed. So now, I can buy more without needing to get the stickers.

I bought them to sound proof a door in my music room. It worked well but there are a few steps to follow.The stickers included were too small for my application so I bought bigger ones on Amazon.They need 4 hours to go back to their original shape, they are shipped compressed.They smell a lot at first, so avoid opening them in a small room without ventilation. Do it in a garage or outdoor if possible. The smell will get you dizzy.Also if you are not familiar with foam panels, you want to push them up against each other and tight together when installing them otherwise you’ll ended up with a loose insulation and the soundproofing won’t be there.Overall great product for the price, don’t ignore instructions.