Trademark Soundproofing Premium Quality MLV Seam Tape, Installation Tape for Mass-Loaded Vinyl Noise Barriers, 6 Mil - 1.5" x 108 (3 Pack)

I used this tape to seal the seams of sections of 2 pound/sf Mass-Loaded Vinyl. It's probably not absolutely necessary but it's the right thing to do, especially if you have THAT many seams (I installed everything myself and can't hold more than 20 pounds of floppy MLV with one hand while trying to staple it with the other ... while on a step ladder!). I don't think any instructions came with the packaging but it bears to note: DON'T STRETCH THE TAPE! Just lay it on loose (no bubbling or pleating, obviously). If you stretch it while you lay it down, expect it to peel off within a minute or two. It's just not how it works. I covered everything up with acoustic panels for aesthetic as well as functional reasons. The noise levels dropped dramatically (about 10db or about half as loud as before). Remember, the MLV is doing the heavy lifting here (and to a lesser extend the acoustic panels). The tape's role is relatively insignificant ... but so is its price. Just one roll was more than enough for a 16x8 wall with seams every 4 feet horizontally and 2+ feet vertically ... so around 75 linear feet of seams.

Not the best quality

Arrived the day after I ordered it and was as described. I used it on TroyStudio High Flexibility Mass Loaded Vinyl Sound Proof 1 lb/sqft sheet. It was easy to cut and apply. Don’t stretch it when you are applying it and make sure it’s at room temperature. It could be a little stickier.

This stuff stretches when unrolling and then shrinks slowly, so if you apply it immediately it pulls itself off the wall. You kind of have to wait for 30s or more for it to contract before applying, and even then it didn’t stick very well to the MLV and parts of it peeled off after a day or so. Would not recommend

This tape is absolutely trash on MLV. All it is, is wider electrical tape and it doesn’t even stick. I’ve tried cleaning and drying the surfaces and nothing. While it’ll stick to itself it won’t adhere to the MLV.

This is very thick and tough tape. I'm not installing vinyl noise barriers, but a solid piece of acoustical board to block the noise and light from a high up bedroom window, which is gifted with the noise of a major road with a long steep grade a few hundred feet away, and nothing in between it and my window. The trucks with dubious mufflers, and motorcycles with none, are no fun at all. I have used both duct tape and masking tape, and neither sticks to the aluminum frame or drywall very well. I find the adhesive on this tape to stick well, and it's somewhat malleable, maybe three times the thickness, or more, of electrical tape. I have used a similar product, colored white; this is tougher stuff. The rolls are generous, allowing for another planned use: the duct tape I used to seal the split vinyl insulation on my hot water pipes under the house has come off, and I think this tape will do the job very nicely--really, it should be perfect. There is at least 80 linear feet to seal back up, but there's plenty of tape. POSTSCRIPT: Every year when the triple digits arrive, I go through the ritual of putting an air conditioner in a window that''s five feet off the floor and eighteen feet off the ground, a &@%÷®~ sliding aluminum window at that, and Lord God Billy Bob, is it ever a pain in the rear. Once I have the unit in place, I have to meticulously seal the edges and install a construct of foam, Reflectix and cardboard to fill up the gap above the unit, which device I use year after year. THIS TAPE IS GREAT! I was able to use if for all the sealing except for on the reflectix--I used drafting tape on the foil, because it releases easily. But on the aluminum window frame and the plastic and steel of the AC unit, it sticks exactly right--holds tight, but you can peel it off if needed, and put it back on and it still sticks. It literally made the job twice as easy and there are zero air leaks, plus it looks good. It cuts easily and precisely without getting boogered up like electrical tape. I love reviewing simple products that work really well; this is one.