The MiraCLAY Bentonite Clay Waterproofing Membrane features a layer of sodium bentonite clay sandwiched between a puncture-resistant, nonwoven polypropylene fabric and a high-tensile strength woven polypropylene fabric, then needle-punched together with durable denier yarns. These fibers are then thermally fused to the polypropylene in a proprietary Infrabond technique, locking the sodium bentonite into place. It is designed for waterproofing below-grade structural slabs as well as construction methods incorporating lagging, concrete caisson or shotcrete retention walls and very effective in rehab waterproofing and zero clearance property line construction.