HD Door Seal Kit 36x84

This will take some work to install. Careful measuring and tiny cuts to make sure you have the perfect fit. Once it's installed though, it's heavenly. It really works. Must have a solid core door, don't even bother if you have a hollow core.

This sound proof door kit does not work at all.

Does a pretty good job of reducing noise. Even when the screw side of the door bottom is installed flush against the hinge-side jamb, the whole door bottom is pushed away by about 1/8 of an inch by pressure on the screw when closing. So I ended up having to trim the inner aluminum piece about about 1/8 shorter than the outer piece. (Or you could trim the whole thing by 1/4 to 5/16 inch instead of the recommended 3/16 inch.) I also had to trim the rubber insert on the door bottom significantly shorter than recommended so that it wouldn't get trapped on either side in the side jambs but rather sit flush against them.

If you have trouble with sound coming through the cracks in your door or even cold drafts these things work really nice. They were very simple to install as well. They seem to be a very good quality. I almost bought a similar product from another manufacturer up twice the cost, but that manufacture kept giving me the runaround. I'm glad they gave me the runaround.