Mixes easily and molds quickly Versatile substance adheres to almost anything and can be combined with a wide variety of materials. Simply add water, no special tools required. Air-dries with no need for firing. Results can be sanded, sawed, nailed or waterproofed. Wet Celluclay can be added to areas already dried. Any unused mixed Celluclay can be stored for several days in a sealed plastic bag in the refrigerator. Certified AP nontoxic. Activa Products Celluclay Instant Papier Mache, 5 Lb, Bright White is one of many Clay & Modeling available through Office Depot. Made by Activa Products.