Vapor Barrier Tape, 7 Mil Black Polyethylene Tape Sealing Moisture Barrier Seam, Seal Tape for Crawl Space, Underlayment, Marine Use, White Insulation Tape, Waterproof, 6 Inch, 100 Foot Roll

Works very well for what is was designed

I don't know how this stuff holds up over the long term so I can't go any higher on rating until I know. I live in an old, wore out mobile home that has had serious hacks working on it in the past. I have some exterior places along the line of the floor that have let in enough air over the years as to feel like it is screened in at best. Before I run some material (probably just some old lumber) for trimmers along the bottom edge, adding in this for both moisture and air barrier has already made a noticeable difference; this environment is called high plains desert, so it is much more of an air barrier than moisture. It sticks down good to this aluminum siding, and I ran 2 rows with some overlap just to make sure it stays down. The section I did yesterday was sort of my test-run, trial to see if it is useful at all - and it seems to do the job. I doubt it'll stand up to the summer sun and wind-driven sand blasting everything here is subject to, which just means I got to get the 'trim' on sooner than later, but it is doing a good enough job that I can proceed with getting the other areas taped up, it isn't meant to be exposed anyway. Ideally, I'll be able to hang Hardy-Plank siding material over it all, but if I have to go cheap and use sawmill scraps, that'll be fine too - the siding board material is a bit pricey for an old place like this.

Used for crawlspace vapor barrier. Worked great.

Compare to any brand and it holds its own

Quality is good. But it’s not waterproof soon as water touches it the adhesive disappears. If you using it for something like boxes or anything that doesn’t have moisture it will work but other than that I do not recommend.

Roll was uneven and received in a dusty, odd clear wrapping. It actually looked like it had been repackaged. We still is it actually didn’t stick, except to itself. Going back to Gorilla. It’s more expensive, but it’s actually works. Buy cheap buy twice.

Works great on 6 mol black vapor barrier

Not sticky at all, started lifting before I finished my project.

Taped down a vapour barrier for a crawlspace encapsulation. The tape was applied with three overlapping strips on each seam, each seam had the vapour barrier overlap by a minimum of 6".Only two days later the tape has not stuck to itself or the vapour barrier in many places.The tempurature was 17°C and humidity under 40% when the tape was applied.Tuck tap that was co-applied is sticking perfectly.