Step 1: Define the purpose of a flexible mold.
Flexible molds facilitate the casting of intricately shaped objects, including those with undercuts, due to their ability to flex or be removed by peeling. They are commonly constructed from materials such as latex, silicone, and gelatin.
Step 2: Clarify the function of a Gel Coat.
A Gel Coat does not function as a mold material. It is a specialized resin applied to a mold's surface (often a rigid mold, such as fiberglass) prior to casting. This resin forms the smooth, durable exterior of the final cast object and lacks the flexibility of a mold material.