To make concrete columns, coat the mold with a concrete release agent, pour the concrete into the mold and allow it to cure for 24 hours. Once removed from the mold, allow the concrete to cure for an additional week or two before applying a concrete sealant.Continue Reading
To make concrete columns:
Apply a concrete release agent to the inside of the mold to prevent the concrete from sticking to the cast.
Prepare the concrete according to the instructions on the bag and pour the wet concrete into the mold. Gently tap the mold while pouring the concrete to bring any air bubbles to the top of the cast.
Allow the concrete to cure in the cast for at least 24 hours, and then remove the mold by prying it apart at the seams. Wrap the columns in plastic wrap and allow the concrete to cure for an additional week or two before applying a concrete sealant.