Side Seal is a flexible packaging type used for the protection and transportation of products. These types of packaging are typically made from polymers such as polyethylene, polypropylene, or polyvinyl chloride, and their flexibility makes them highly effective in preserving and transporting products.

The distinctive feature of side seal flexible packaging is the presence of a sealing point along the edge of the package. This sealing point allows the package to be sealed for the purpose of preserving and transporting the enclosed product. Side seal flexible packaging is commonly used, especially for the transportation of food products, but depending on the type of polymers used in their production, they can also be used for various other products.