Concrete grey colour, non-firing clay is a natural modelling clay that self-hardens in the air without firing, giving strong, durable and solid results. Being clay, it has very good plasticity for modelling and its natural cellulose fibres allow it to dry without cracks, even in large pieces. It allows you to create very fine details when modelling. It can be modelled and shaped on a potter's wheel. It is easy to clean from hands and clothes using water. It is easy to remove any residue from surfaces and furniture using a damp cloth. Once dry, it can be painted or varnished. It can also be polished, tiled or perforated. After complete drying (4 to 5 days), it can be waterproofed to make non-food airtight containers. It stays stable in its original packaging for a minimum period of 2 years.