e less than 3¡a5 minutes , otherwise, once the silicone rubber has cross-link reaction during vacuum pumping process, it will not be operated. Step three: pouring the mixture into the frame with original mold slowly . Shelf life for silicon rubber for mold making 8~10months, when stored in a dry & cool place under the room temperature 25. Packing for silicon rubber for mold making 20kg/drum for part a+ 20kg/drum for part b in one set , 200 kg/drum for part a+ 200kg/drum for part b in one set 25kg/drum 200kg/drum
