What is the chemical name for the family of fast-acting adhesives that solidify into an inert polymer?

The chemical name for the family of fast-acting adhesives that solidify into an inert polymer is cyanocrylate. This class of adhesives is known for its rapid curing properties and strong bonding abilities, making it highly effective for applications such as eyelash extensions. Upon contact with moisture, cyanocrylate begins a chemical reaction that initiates the adhesion process, resulting in a stable bond. The inert nature of the polymer formed after curing ensures it does not react further, which is essential for safety and comfort in cosmetic applications.

The other options do not pertain to this specific class of adhesives. Formaldehyde, although a chemical compound, is primarily used in other contexts like preservatives and is not associated with the bonding capabilities of cyanocrylate. Eyelash extensions refer to the extension materials themselves, while "polymer" is a broad term that covers various large molecules formed from repeated structural units but does not specifically identify the chemical basis of the adhesives used in the lash extension process.