Mold Making Essentials - How to vacuum silicone to eliminate entrapped air and remove bubbles from your finished mold or casting.
Mix Parts A & B thoroughly as per Technical Bulletin. Place mixing container into vacuum chamber. Ensure a tight seal between lid gasket and chamber. Turn on vacuum pump. Close vacuum valve to enable air flow. Vacuum pump must pull 29 inches of mercury (inHg, or 1 bar). After silicone falls, vacuum for an additional 90 seconds. Do not over vacuum! Turn off pump. Relieve pressure in chamber by opening valve. Mold Max™ 30 is now ready to pour.