Liquid plastic, also known as Plastisol, is the primary material used to make soft plastic lures. Out of the bottle, liquid plastic is a thin, white liquid which changes to a soft, clear plastic when heated to approximately 350 degrees Fahrenheit (there are no catalysts to add, just heat). The stiffness of the final product can be changed with the addition of plastic softener or hardener.
Liquid plastic is incredibly easy to use. Simply heat the liquid to 350 degrees, at which point the plastic will turn clear and have a syrupy consistency. Unused or excess plastic can be remelted and used repeatedly, though the plastic may discolor after repeated or excessive heating.