This item is a tool for use in model assembly. It does not require either cement or paint to complete or use.
Here's a set of molds to make your own doll heads, in two sizes: 25mm and 30mm (chin to top of head). There are no backs to these molds, as you are instructed to simply "build up" the back of the head with whatever material you are casting. One bit of advice offered in the instructions is to "pour starting with the nose." Good advice in a variety of situations!