Kaqiluo High Density Self-Adhesive Sound Insulation Acoustic Foam, 0.4" x 12" x72", 10mm Thick,5.8 sqft Sound Proof Padding, Fire/Water Resistant Acoustic Treatment Foam.

Its ok, quality is good but cannot really say that it does block noise in the Pipe

foam pad with a sticky backing, the foam is not a solid foam but still enough to hold its rigidity, i use it for sanding and need to keep it flat. So cut the sandpaper to your size stick it on the foam and the area of sanding isn't shaped like your hand or fingers. thats what i'm using it for

I bought this to add to the sound deadening underneath my new double kitchen sink. I cut and installed the whole roll and within hours it was pulling away from the underside of both sinks. I cleaned both sinks with mineral spirits and let it dry completely before I attached this black foam roll. They need to improve the sticky adhesive that they use. I had to use regular duck take to hold it down. The duck tape is the only reason it’s still installed. Without the duck tape it would fall off. Will not buy again.

Clean the walls well and be careful...the adhesive is VERY good. Easy to use and the room is almost completely soundproofed. It's great. Be careful.

Used on the bottom exterior & interior of an indoor fountain (sits on tile) to help mask the hum of the pump. Not gone but definitely reduced, and the pump noise is now less than the water noise.