Lash extension glue is typically formulated with cyanoacrylate, a type of fast-acting adhesive that creates a strong bond. Cyanoacrylate adhesives are commonly used in the beauty industry for various purposes due to their quick drying time and strong adhesion properties.

The glue is designed to be applied to the base of the lash extension, near the root, and then carefully attached to an individual natural lash. When the glue comes into contact with the natural lash, it bonds the extension to the lash, creating a seamless and natural-looking result.