Custom pouches, often used for packaging food or other products that require a protective air seal, need to be sealed using heat. Whether you use a stand-up pouch or flat pouch that comes with a resealable zipper, they require a designated machine to seal using heat such as an impulse sealer or band sealer so that your products are not tampered with.
Impulse sealers (shown on the right) have heating wires that generate heat only when the sealing bar is pressed down. They are quick and accessible gadgets best for small-scale sealing. You can find a variety of them at affordable prices such as this one on Amazon.
Band sealers are often used for large-scale productions. Similar to impulse sealers, they seal the stand-up pouches using heat but in a continuous manner. A heated band seals the pouch as the pouch is fed through the machine, often allowing for more efficient and consistent sealing.