ImPRESSive Putty requires no mixing or weighing. It is eco-friendly, re-usable and microwaveable. Simply heat the putty and press the object you want to duplicate into the molding putty or press the ImPRESSive Putty onto your object. It works like silicone molding putty. It is great for higher temperature casting materials and is re-meltable. 6 oz. per package.