ARDEX S 15 C is a polymer-modified, cement-based tile adhesive specially developed for the wet-on-wet installation method. It is mixed into a free-flowing slurry and applied over fresh cement screeds for fixing vitrified tiles, ceramic tiles, and stable natural stones. Compared to conventional cement slurry, it delivers superior bond strength, longer working time, and improved adhesion, making tile installation more reliable and durable. The product is economical, easy to spread without a notched trowel, and is available in grey and white variants. It is intended for horizontal applications and is not suitable for moisture-sensitive stones or vertical installations.