Abstract: An air-dry clay moldable and workable for sculptural applications, comprising a formulation of: (1) caulk or caulk base material and (2) a thickening agent and/or a detackifier in sufficient proportions to form a clay that can air dry to a substantially solid form at room temperature. The clay may include both a thickening agent and detackifier. The caulk or caulk base material comprises by weight percent: 40-90%, or 50-80%, or 60-75% of the formulated clay.