Schluter Kerdi is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Schluter Kerdi is made of soft polyethylene, which is covered on both sides with a special fleece webbing to anchor the membrane in the thin-set mortar. Schluter Kerdi was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Tiles can be installed directly on Kerdi using the thin-bed method. Other trowel-applied covering materials, such as plaster, can also be used. Schluter Kerdi is a great shower pan material, and it is used as a waterproofing for shower and tub surrounding areas. Schluter-Kerdi is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous use steam rooms and similar applications. Pre-formed sections of KERDI are available for inside and outside corners, pipe protrusions and mixing valve openings. Use KERDI-BAND, in widths of 5" (12.5 cm), 7-1/4" (18.5 cm), or 10" (25 cm) to seal butt joints or corner joints. KERDI-FLEX, in 5" (12.5 cm) or 10" (25 cm) widths, is used to seal expansion joints or flexible edge joints.