I am storing it in a Ziploc bag after use. It's hard enough that it will dent if you press it with your finger, so I think it's fine to use. PADICO Artista Formo Remaining amount: 280.5g White PDC2105 -----Product Overview----- Shrinkage rate: 4.8% Size: 500g Material: Pulp, stone powder, adhesive, water artista formo Product Features: This resin clay has a fine texture and is less prone to cracking. It is a stone-like clay made with an emphasis on ease of modeling. It can be used as a material for sculpture, crafts, dolls, and more. [Water Resistance] × No water resistance after drying [Clays that can be mixed] 〇 Stone-like clay, wood clay × Lightweight clay, resin clay, oil clay [Paints that can be mixed] △ Not suitable for mixing paint [Coloring after drying] 〇 Watercolor paints, acrylic paints, oil paints [Carving] 〇 Carving after drying is OK #art #design #modeling #clay #plaster #crafts #creation #art #production #artsupplies #white #summerproject # # # 180_1207ni20.344