The Knauf Bau- und Fliesenkleber is a polymer-modified thin-bed adhesive designed for securing ceramic tiles and stone. This C1 TE classified mortar is versatile enough for use on both walls and floors in indoor and outdoor environments, ensuring a reliable bond across a wide range of substrates including concrete, screeds, gypsum fiber boards, and various lime or cement plasters. Coming in a 25 kg bag, the mixture is known for its high initial adhesion, which helps keep tiles in place during application. Depending on where you are working, you can adjust the consistency by mixing 5 kg of powder with 1.1 to 1.4 liters of water for wall areas, or 1.5 to 1.7 liters for floors to achieve the necessary stability.