Schluter KERDI Waterproof Membrane, 3' 3" x 33' is a sheet-applied polyethylene waterproofing membrane and vapor retarder designed specifically for use in tiled showers, bathtub surrounds, steam showers, and other wet areas. This flexible membrane effectively prevents water damage that can cause mold and mildew growth. It features a modified polyethylene core with non-woven polypropylene on both sides, allowing it to anchor easily in thin-set mortar. With an 8-mil thickness, the membrane provides a consistent and reliable waterproof barrier for tiled surfaces on walls and floors. The KERDI membrane is for quick and efficient installation, minimizing seams to ensure thorough coverage and lasting protection. Model Number: SLRKEDI10M