The materials were of high quality and worked as advertised.

This is a must have when doing your crawl space encapsulation. I am fully confident this tape will keep all my seams sealed. Well worth the price.

Used the crawlspacevaporbarrier.com system with 12 mil walls and 20 mil floor. All products very high quality. Seam tape works as advertised and I wouldn't substitute a lesser product. Buy plenty- maybe 3 times more than you think you will need. Keep you tools sharp and clean from adhesive to avoid frustration.

Holds well. Delivered width is closer to 3-3/4" rather than 4". 15 mils thick.

Tape sticks well and is flexible. It does not actually bond to the liner but rather has a strong adhesion, so you are able to pull it off and reposition it, albeit with quite a bit of pulling. Take your time and concentrate while lying it down to minimize air bubbles. Also be aware that when sealing around inside corners or bridging gaps, lay the tape without creating tension on itself or it will pull itself off and or up. That's the tradeoff for not bonding but if this stuff bonded like butyl rubber does to the liner, you would be in trouble if you put it down incorrectly or got off track while joining to pieces of liner. After putting down several hundred feet of this tape, I have no qualms stating that it is a high quality product that compliments the Silverback liner I used.