CCW MiraClay Bentonite Clay Waterproofing Membrane features a layer of sodium bentonite clay sandwiched between a puncture-resistant, non-woven 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. MiraClay is designed for waterproofing below-grade structural slabs as well as construction methods incorporating lagging, concrete caisson or shotcrete retention walls. MiraClay is also very effective in rehab waterproofing and zero clearance property line construction.