High Density Self-Adhesive Sound Insulation Acoustic Closed Cell Foam, 0.4" x 12" x 71", 10 mm Thick,5.8 sqft Sound Proof Padding, Fire/Water Resistant Acoustic Treatment Foam

This was a lifesaver for my office at work. When the offices were built, the wall did not go all the way to the window, which meant I got to hear everything my coworkers next door were talking about, vice versa. I purchased this and it improved immensely. I do recommend you buy 2 to help with the sound going as well as the sound coming. It is a great value for the money, and I highly recommend it and will be purchasing more, seeing that I have moved offices since, so I need to finish the office I am currently in. Lastly, it was easy to install, adheres perfectly, and it is the perfect thickness for a soundproof barrier. I highly recommend!

Great sound dentening. Very aggressive as well. Thank you.

small really has to buy a lot so that it can isolate the sound

Purchased this for sound equipment, once applied, it shrunk. Very adhesive though, which is nice but just wish it stayed in place.

This high-density acoustic foam works amazingly well for soundproofing and insulation The closed-cell design blocks out noise effectively, making it perfect for home studios, offices, and even automotive applications The self-adhesive backing is strong and sticks securely to different surfaces without peelingThe 0.4-inch thickness provides great coverage, and the material is fire and water-resistant, making it durable for long-term use It is also easy to cut and shape, allowing for a custom fit in tight spacesThis product offers great value for money excellent functionality and is easy to use If you need high-quality soundproofing foam that is durable and effective, this is a fantastic choice Highly recommend

They’re rolled the opposite way of the glue side so they unravel and don’t stick. Worthless!! Do not buy

This is very good at sound isolation. The adhesive on it is very unforgiving. Absolutely make sure you place it exactly where you want to, and make sure you never want to remove it, because once it is attached it isn't coming off without a fight.

They were easy to install and a huge difference in sound deadening. I use these panels inside my van and although they were real sticky, easy to cut and install.