Vacuum molding is used to make large composite parts with a one-sided tool and a vacuum bag to form the component. This process is similar to vacuum bagging for thermoset composites. Silicone reusable membranes can be used.

Description of the process:
- Position TWINTEX® on an open-faced mold.
- Place a vacuum bag over the TWINTEX® and seal the material to the mold.
- Remove the air from the bag, sandwiching the TWINTEX® between the bag and the mold.
- Heat mold to achieve material temperature of 200°C.
- Cool the part to below 100°C.