I bought this to seal below grade EPS insulation and the vapor barrier on top, all to be covered with a slab of concrete. It was expensive and the shipping added another $15 dollars to the total ... but it was absolutely necessary, worked really well, and was the proper product for the job. Good professional-grade quality.

This is a good product that performs it's job well in a crawlspace. The only drawback is that it's so thin that when you get down to a third of a roll it gets a bit harder to use. Tip- always order an extra roll for three you think you will need.

Moldstoppers of MD has been involved in crawlspaces for years - whether installing or contracting them. We have seen good tapes and we have seen bad tapes. Believe me the amount time it takes to do one of these projects correctly can all be undone by using the wrong sealing tape. This product has the advantage of being wider. Remember your under a house. Cuts can get a little crazy. A wide tape is important. Also it doesn't separate - even in extremely moist conditions. Terrific product

Man this tape is worth the extra cost. I've been doing this for 12 years and no other tape compares at all. Not even close. If you are in this business and you save $12 on a 187 foot roll, you're really doing a disservice to the client by using a lessor brand. watch out for mimics too. Some are trying to make their tape look like this ST4

Tape works well on clean surface