How To Make a Urethane Rubber Mold of Prop Gun
Overview
To cast multiple prop guns, PMC® 121-30 is an excellent mold rubber choice. The material is low shrinkage, easy to use (1:1 by volume mix ratio), and self de-airing. This application illustrates a cavity pour mold with a gypsum support shell. Ease Release® 200 is sprayed into the mold before the pigmented Smooth-Cast® 325 is cast.
Materials Used in this Tutorial
- PMC® 121-30
- Ease Release® 200
- Smooth-Cast® 325
- Mixing Sticks
- Mixing Containers
- Gypsum Support Shell
- So-Strong
Step 1: Prop Gun Mold With Legs
In the picture below the mold is closed. Notice the legs used to hold the mold in a pouring position.
