Access Floor Waterproofing is a multi-layer flooring application designed to prevent leakage through raised access floors in case of water pipe rupture. Consisting of a neoprene elastomeric membrane and a cementitious wear course, apply it directly to concrete floors with a trowel, brush, roller, or squeegee. It is water-based, VOC compliant, and can be used on new or existing concrete. Dex-O-Tex Products, div. of Crossfield Products. 310-886-9100.