I've been waiting to find a way to make my office more soundproof. Putting products on the door didn't prevent voices from my office from entering the next room (I want privacy) and vice versa. I put this tape on the door frame and it makes a huge difference! Not completely soundproof, but muffles the sound enough that words in the neighborhood aren't clearly audible. The door is very tight due to the thickness of the tape, but I have a different exit door from my office, so "tight" is ok and the best soundproof wall!