Perfect for beginners and experienced sculptors alike, this moldable air dry cement from Craft Smart is pre-mixed and ready for use right out of the bucket. This cement clay requires no oven or kiln for hardening and does not easily crack. It has a drying time of approximately 24 hours, depending on the size of your project.Details:Gray1 lb. (453.5 g)Pre-mixed and ready for useApproximate 24 hour drying timeDoes not easily crackNo oven or kiln neededConforms to ASTM D-4236Care Instructions: Moldable cement should be kept sealed and used as soon as possible after opening. Keep away from moisture and direct sunlight.