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Vacuum sealing is a method used to preserve food by removing air from a package or container before sealing it. This process helps extend the shelf life of food items by reducing exposure to oxygen, which can cause spoilage. Vacuum sealers work by removing air from specially designed bags or containers and then heat-sealing them to create an airtight environment.

The vacuum sealing process helps prevent freezer burn, slows down the growth of bacteria and mold, and preserves the freshness and flavor of food items. It is commonly used for storing meats, fish, fruits, vegetables, and other perishable foods in the freezer or refrigerator. Vacuum sealers are also used for sous vide cooking, marinating foods, and storing non-food items such as documents or clothing to protect them from moisture and pests.