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.

This stuff sticks like barnacles on a sea vessel. Forget trying to reposition it once it touches — you’re tearing it off in little pieces. Didn’t work as I had hoped, however, I think it could in the right situation. Prefer it being super sticky (as it is) to being a half committed loser of a product (like my daughter’s boyfriend).

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

Does not stick to surfaces that well.

Works better than advertised