Blu-Stuff Putty is a two part silicone elastomer which cures quickly at room temperature. When mixed (in equal parts of Blue and Grey) the putty will have a working time of approximately 60 seconds and cures with a firm finish within just 3 minutes. Due to it’s firmness when cured Blu-Stuff Putty is ideal for use as a mold for casting objects and surface detail with clays and epoxy putties. It can also be used to cast resins and plaster. Blu-Stuff Putty is not intended for use with food preparation.