kato polyclay polymer clay 2 ounces / 56 grams, polymer clay kato polyclay brick of 56 grams (green) kato polyclay kato polyclay is the strongest and most permanent polymer clay available. this formula is preferred by artists over other leading brands because of its curing properties, vivid colors, and ease of use. kato polyclay colors can be mixed to create any desired shade. easy conditioning and handling with a non-sticky formula. good color stability and uniform consistency, plus superior cured strength at a great price. the recommended curing temperature for kato polyclay is between 275f (135c) and 325f (165c) for 10-30 minutes. made in usa