The Knauf Flexkleber is a professional cement-based adhesive enhanced with polymer additives, designed for the secure installation of ceramic and porcelain tiles as well as natural stone. This versatile mixture of cement, sand, and artificial dispersed resins comes in a 25kg bag and is suitable for both internal and external applications. Because of its flexible composition, you can use it for demanding projects such as heated floors, balconies, terraces, and external cladding. It is also an effective choice for laying large format tiles or installing new tiles directly over old ones on walls and floors, ensuring a stable bond in various environmental conditions.