The HARDPAST model by Bisbal Clays is a 100% natural air-drying clay that hardens within 24-48 hours without the need for firing. With a fine texture that is easy to work with, it is perfect for ceramicists, sculptors, and creative activities. We now offer a new packaging format in 0.5 kg and 1 kg, ideal for all project needs. Perfect for schools, crafts, and art. Made with natural ingredients and preservatives, it ensures quality and safety in use.