ARDEX M 15 is a grey, polymer-modified, water-resistant thin-bed adhesive specially developed for laying Autoclaved Aerated Concrete (AAC) blocks. It offers excellent adhesion, easy mixing, and smooth application while eliminating the need for water curing. Designed for both interior and exterior blockwork, it provides stronger, more uniform joints than conventional cement mortar, resulting in faster construction, reduced material consumption, and improved wall stability.