An adhesive or coating that hardens quickly in the presence of moisture (the curing agent) and may be hardened faster by using a catalyst or accelerator.

Peter DeSantis of DeEnterprises explains: "Cyanoacrylate is the generic chemical name that encompasses a variety of rapid curing adhesives. Cyanoacrylates include, but are not limited to, nail glue for artificial tips, the resin used for dip nails or fiberglass wraps, even household super glues."