BXI Double Noise Blocker Sound Proof Foam, 39.4 X 13.4 X 1 inch Egg Crate Foam Rubber Sound Deadening Material, Sound Dampening Acoustic Panels for HVAC, Pipe, Machine, Window, Wall, Door

This stuff is high quality and worked way better than I thought it would. I split it down the middle and used a piece for each rear strut tower and wheel well. I did not glue it to the car I glued quality magnets to the rubber side. It's plenty flexible and this keeps moisture from damaging the car and of course can be pulled right off for inspection. The rear seat holds the rest in place. Amazing how quiet it is to have a conversation with someone in the back seat doing 70 down the highway. Yikes.... if more people understood this it would put the luxury car market in serious jeopardy. Anyway, this was my particular use for it and I am impressed. Also thanks for not shorting the length. I think it was even over by half an inch. Rare these days to get anything that is honest.

A bit expensive for what it is. It's on the thin side, which is good if you're packing this into an enclosed space, but the heavy rubberized back side does a decent job reducing low frequency sounds, much more than just the lightweight foam does. Quality is middling, and the layers are prone to separating but it's fine if you install it once then don't touch it. Size was as advertised but again a bit small for the price of over 20 bucks. I didn't try to cut it but it should be easy to cut with a box cutter. I mounted the whole thing to the side of a noisy furnace to cut down on sound bleed into the next room. It's not really meant for hanging on walls as there is no included adhesive, but I guess you could staple or nail it to the wall.

Works well! I've had mine for a while, and while its not magic, it definietly helps muffle any annoying sounds laying around. The price for the size is great, and its extremely high quality, and the adhesive on the back is almost too well built, it is ment to stick and stay stuck. Overall recommend.

This is not for size which is what I wanted it for. Check measurements. It’s also heavy and doesn’t adhere well.

Works great and is easy to mount.

This foam works incredibly well for reducing noise and vibration. I used it to line a door and part of a wall, and the difference was immediately noticeable—outside noise is greatly reduced, and the room feels quieter and more controlled. The egg crate design and rubber backing add both durability and great sound-dampening performance. It’s easy to cut and install, and it stays in place securely. The quality is excellent, and there’s no strong odor like some cheaper foam options. Highly recommend for anyone needing affordable, effective soundproofing!

This is a nice soundproof option. It is well-made and easy to cut to size. It is not something I would use alone, but it is a good second layer or if you have something oddly shaped. It reminds me a lot of quilt batting. It is very thin and soft, I would use this more for setting something on that only needs a little cushion.

I wasn’t sure what to expect with this since it’s a single panel, but I was actually impressed with the difference it made. I used it to line a utility closet where a small pump was creating an annoying hum that carried through the house. Just one of these panels, cut to size and mounted with construction adhesive (rubber side out), noticeably reduced the echo and vibration noise. It’s not a miracle solution — it won’t give you total silence or replace proper soundproofing — but it works well in the right scenarios. Think HVAC hums, pump cabinets, or small machine noise. The foam side helps with acoustic absorption, while the rubber side seems to help block and deaden vibration. It's lightweight but has some density to it, which is nice. The only thing I’ll flag is that there’s no adhesive backing, so you’ll need to get creative with install depending on your project. Tape, adhesive, zip ties — all would work, depending on the surface. Also, it's flexible, so wrapping oddly shaped items is no problem. For sound studios, I’d use this as a complement to other foam or bass traps, not a replacement. Overall: it's well-made, has multiple uses, and definitely reduces noise.