Easy 3D Flex is an inorganic powder which when mixed with Powertex can be used to create various textural effects or to make a modelling clay. It is more elastic than Stone Art and is designed to crack as it drys. You can mix it in different quantities to make a runny mix, a thicker structure or an air-dried clay that dries rock hard. When using stamps or stencils pressed into the clay it gives very precise and stunning results. This medium will show cracks when applied in very thick layers, by drying your artwork in the sun or by adding water or Bister to the surface. Cracks can be avoided if you create thinner layers or add sand to the mix. It is an incredible medium that invites experimentation!