CLAY-TITE is a dual-layer waterproofing consisting of virgin HDPE (20 mil), sodium bentonite, and a protective layer consisting of non-woven polypropylene. The HDPE provides the first layer of waterproofing, while the bentonite’s self-sealing capabilities ensure positive puncture protection under hydrostatic conditions. The polypropylene fabric protects the bentonite from the direct installation of shotcrete.