The tubing method of applying hair extensions requires the use of:

The tubing method of applying hair extensions specifically involves the use of heated tools. This technique utilizes small silicone or metal tubes to secure the extensions by clamping them onto the natural hair. The application process typically requires a heat-based tool, such as a fusion iron, to melt the bond of the tube, which allows it to hold the extension securely in place.

Heat is critical in this method because it ensures that the adhesive is properly activated and bonded to the natural hair, resulting in a secure attachment that can last for several weeks. As the heat tool is used, it softens the bonding material within the tube, allowing for a seamless integration of the hair extension with the client's natural hair.

In contrast, options like clips, sewing needles, and hot glue are associated with other hair extension application methods, such as clip-in extensions, sew-in wefts, or glue-in extensions, respectively. Therefore, the tubing method's focus on heat tools for the application process makes it distinct and effective in securing hair extensions.