Foundation seal tape works great and performs as described. I would purchase this product again in needed.

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

I purchased the 20 Mil liner for my new construction crawl space and had it installed and then sealed to the walls by a reputable spray foam company. They and I are were impressed with the product. The crawl space has extremely low humidity since installation. The liner seems very durable. I am happy with the choice.

Tape worked great. Was easy to use . Made the job of sealing the sde walls of the foundation and the vapor barrier a breeze.

All Project products work very well. I am very happy with the results would highly recommend.