Grey? Boring?... Ubiquitous! Cement is the most widely used substance after water. Cement and Concrete are central to what we consider modernity (as an architectural style), urbanisation and construction. Cement holds key promises of development and is also the harbinger of toxicity, pollution and destruction. In this workshop we follow cement, how it appears and disappears in our urban fabric, how it features in different imaginations. How it emerges aesthetically, bodily and materially. The aim, besides tracing the poetics of cement, would be to train in following one material and be sensitive to the diverse and often contradictory worlds it assembles.