Which method is commonly used to secure hair extensions without glue?

The method commonly used to secure hair extensions without glue is braiding or sewing. This technique involves either braiding the natural hair tightly to create a base for the extensions or sewing the extensions onto the braids using a needle and thread. This method is favored for its durability and the ability to provide a more natural look, as it allows the extensions to blend seamlessly with the natural hair without the potential damage that glue may cause.

Additionally, using braiding and sewing minimizes the risk of allergic reactions or sensitivities that some individuals may experience with adhesive products. This method also allows for greater flexibility in styling and promotes the health of the natural hair by avoiding the exposure to chemicals found in some glue products.