Dip a piece of the Mold clay in hot water (approx: 80 degree C) for about 3 to 5 minutes. Take the Mold clay out of the water with a pair of tongs and wipe it dry with a towel. While it is still soft, press the material you wish to mold into the Mold clay. If the Mold clay gets hard while you are working with it, place it back in the water and begin the process again. Allow Mold clay to cool down, remove your object and your mold is ready for your clay project. Mold clay is re-usable. clear white, 2.28 ×0.61 ×0.31 inches per piece. Mold is a bit flexible when it is cool so you have no problem taking out your finish product out of this mold.