It is a plastic based form paste with a hard dough consistency at room temperature that can be easily shaped. Modeling clay is used to make polyester molds, especially those that have no specific geometric shape, plaster and woodsmith require more precise details. During the winter, it is kept for a while in hands and softened so that the desired form can be given. The polyester does not stick to the modeling clay, so it does not require mold release or wax application on it. It can be used many times until it gets dirty. The modeling clay is also used for joining polyester molds.