Dispense Body Double® FAST SET into a cup and carefully brush it onto all areas of the model's face and head. It is important that the first coat achieve thorough coverage over all parts of the head. As more material is needed, Body Double® FAST SET can be meter mixed directly from the dispensing gun. This saves time when working with fast setting materials. Continue to build up more Body Double® FAST SET in layers over the model's head until ultimate mold thickness is approximately 3/8'' (1 cm). Once the silicone has been layered to an appropriate thickness, a rigid support shell must be built. Before creating the shell, allow the Body Double® to fully cure (approximately 5 minutes after application).