Blue Summit Supplies Vapor Barrier Tape, PE 9mm Polyethylene Tape, Moisture Barrier Seam for Crawl Space or Marine Use, Waterproof White, 3.78" Wide, 180' Length

Perfect match for the crawlspace material I bought from Amazon as well.

I used this to join the rolled foam insulation that I put on the roof of a barn I built, and it worked perfect. The underside of the foam was white plastic, so the color was perfect and it stuck fine. I had some leftover and tried taping some other things only to find it didn't stick as well. Bottom line, use it for what it was meant for.

This stuff is terrific - sticks to all sorts of material (I've had it adhere to concrete for two years!).Works very well in dirty environments and aggressively sticks to plastic vapor barriers, while somehow allowing you to reset the tape if need be. Also very easy to unroll and cut.

This tape is pricey but it’s very good at sealing seams of vapour barrier.

Got some of this to do some repairs to our crawlspace vapor barrier. It's absolutely great stuff - good width for seam taping or patching small holes. Very happy with it.