How to Make a 2 Piece Core Mold: Concrete Urn Example

Our model is a detailed urn made of concrete. First the urn is measured for dimensions and then acrylic coated boards are cut to size. The mold box walls will follow the contour of the model. Construct the mold box and secure it with drywall screws. To make mold box handling easier two handles can be attached.

Use a black marker to mark the inside edge of the mold box to define the clay bed perimeter. Remove the mold box to expose the perimeter line.