Sealing System: After the pouches are filled, they need to be sealed. This component guarantees the pouches are airtight, maintaining the contents clean. Unique sealing procedures, like warmth sealing or ultrasonic sealing, can be used according to the components included. very flammable. It's a small solubility in h2o but https://www.linpack.com/news/choosing-the-right-tray-sealing-machine-for-your-business