We poured the Spartite into our mold this morning. First I taped two hospital bed pads tightly around the partners.
Then I mixed the goop according to the directions...
And poured it in. It didn't fill the mold, but we knew we would need a double batch so we repeated the mixing and poured the second batch on top of the first.
I poured in enough to take it about 1/4" above the partners, then we carefully disposed if everything in a trash bag.