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

The reproduction will be made with duoMatrix® NEO (Polymer Modifed Gypsum). The mix ratio is 2 Parts A : 1 Part B by volume. Add one part play sand for additional texture. Mix all components thoroughly for three minutes, making sure to scrape the bottom and sides of the container. Add So-Strong® Brown pigment to mix for color. Pour Matrix NEO slowly into cavity. After Matrix® NEO cures for 90 minutes, remove the mold box.