Long-lasting PE Material: Item Size: 3 x 43 ft(1 x 13 m); Color: Gray; Thickness: 10 mil. The upgraded three-layer designed shower membrane features a modified polyethylene core with non-woven polypropylene on both sides, which is tough, tear-proof, and can be used for years to come. Water & Vapor-proof: This membrane roll is compatible with tile, ceramic, or stone wall tiles, which helps keep water build-up from forming beneath your tiles and causing further damage. 10 mil Thick & Soft to Cut: Our membrane for tile is highly flexible, making it easy to cut into strips with scissors or a paper cutter. Convenient for sealing corners and getting a quick DIY installation. Effortless to Install: Constructed with fleece on both sides, the waterproof tile membrane can be anchored with an unmodified thin-set mortar. Note: We recommend installing the membrane behind the tiles of your shower walls and floors. A large coverage area of about 140 sq.ft(13 ㎡). Create Your Water-proof Environment: Ideal for bathrooms, steam rooms, sauna rooms, kitchens, etc. This shower waterproofing can keep water or vapor from penetrating tiles, ceramics, or wood floors and refrain from tile cracks.