Flex SD60 Waterproofing Vapor Retarder Crack Prevention Polyethylene Membrane 323 Sq Ft Roll (3'3" x 98'5"), 25 Mil Thick For Ceramic Tile and Stone, Floor Underlayment For Bathroom and Shower

Kobau Flex SD60 waterproofing and vapor-retarder membrane provides superior moisture protection and crack isolation for bathroom tile, shower tile, and other wet-area floor and wall installations. Engineered for high-performance home improvement applications, this 25 mil thick polyethylene membrane underlayment ensures long-lasting durability and a high level of resistance to water damage, making it ideal for ceramic tile, porcelain tile, marble tile, granite tile, mosaic tile, and natural stone installations. The bonded fabric layer of this waterproof floor membrane creates a strong mechanical bond between the substrate and tile layer, securing bathroom floors and shower walls against structural movement and water infiltration. Kobau tile underlayment is a top-tier solution for floor waterproofing, vapor management, and crack prevention, suitable for both new construction and renovation projects. Perfect for residential and commercial use, this waterproofing membrane is commonly installed in steam rooms, shower enclosures, bathrooms, bathtub surrounds, kitchens, balconies, and other spaces subject to water exposure. The premium polyethylene core is designed to block vapor transmission while maintaining flexibility and ease of installation. It is particularly well-suited for DIY bathroom remodels, professional tile installations, and home decor upgrades requiring high moisture protection. The Kobau Flex SD60 vapor barrier membrane features synthetic webbing fibers on both sides for optimal adhesion to thin-set mortar, ensuring a secure and watertight seal under tile. It acts as an effective crack isolation membrane, helping protect floor coverings from subfloor movement, temperature fluctuations, and settling. Whether you’re installing floor tile in a new shower or retiling an older bathroom, Kobau's floor underlayment system delivers superior waterproofing performance, vapor resistance, and crack suppression for a professional, long-lasting tile installation.

• Bonded polyethylene membrane, 1 m (3′3″) width, a vapor retarder membrane with crack prevention capabilities, an ideal waterproof underlayment for showers
• Synthetic fiber fleece-webbing on both sides ensures a strong bond with thin-set mortar adhesive, allowing installation of ceramic, porcelain, marble, mosaic, or natural stone tile directly over cured membrane
• Low permeability rating provides reliable vapor protection, making this flooring underlayment suitable for wet environments such as steam rooms, bathrooms, kitchens, balconies, terraces, and pool surrounds, it an ideal shower underlayment and a dependable tile waterproof solution
• Comprehensive suitability for residential living areas and commercial spaces, including modern bathrooms, steam rooms, hotel spas, restaurants, and food courts, providing an effective waterproofing solution
• Permanent waterproofing performance - Engineered for permanent waterproofing on water-sensitive substrates and around floor drains