Impulse Sealer Hand sealers and impulse sealers are both types of sealing machines that can be used to seal small gaps and crevices in materials. However, there are some key differences between the two machines that you should be aware of if you’re planning on purchasing one. Hand sealers work by heating up the surface that you’re trying to seal with heat from an electric or gas furnace. This creates a vacuum inside the machine, which causes the material to adhere to the surface. Impulse sealers work in a similar way, but they use air pressure instead of heat. This pressure creates a vacuum which causes the material to adhere to the surface. Hand Heat Sealer Overall, hand sealers are less expensive than impulse sealers, but they tend to require more training and experience to use effectively. If you only need to seal small gaps and crevices, an impulse sealer might be a better choice for you. Hand sealers are used to seal small packages or envelopes. While on the other hand, impulse sealers are best for sealing large items like vegetables. Hand sealers are usually gentler and can be used on delicate materials, whereas impulse sealers can be more effective and faster while sealing large items. Ultimately, it depends on you which type of sealer you prefer. Also, the hand sealers are very less aggressive compared to the impulse sealers, so they are a good option if you do not need an airtight seal.