Purchase a mold for your sculpture. Cement may be cast in any type of material including plastic, metal, plaster or rubber. Typically, the mold is made up of two pieces which can be joined before you start the casting process. The mold has a hole at the top, which is used when you pour the cement. As a beginner, opt for a smaller mold.
Prepare your working space. Choose a space in your yard or in the basement; working with cement may be messy. If working in a room, cover your furniture with newspapers.
Prepare the cement in a larger bucket. Choose white Portland cement, which is easy to work with. Mix the cement with the acrylic binder and pour water, mixing continually, until you obtain a liquid solution.
Use smaller buckets to cast cement in your mold. Fill the mold entirely.
Allow the cement to harden in the mold for at least 12 hours. Cement cures best in humid environments.
Check if the cement is hard introducing a paintbrush through the top hole in the mold. If the cement doesn't stick to the paintbrush, the sculpture has hardened. Remove the molds only when the sculpture is hard.
Use a coarse-grit sandpaper to remove any extra cement that may form where the molds join. Keep the sculpture in a dry space for 24 additional hours before you paint or stain it.