Cyanoacrylate adhesives are fast-acting, single-part adhesives. Also known as instant adhesives or simply CA, they have high mechanical strength and cure immediately when exposed to moisture in the air. Cyanoacrylate adhesives typically have low resistance to chemical reactions with water, and therefore, are not suitable for joints exposed to weather. Cyanoacrylates are also known by the brand names Krazy Glue and Super Glue, and are both brands carried here at R.S. Hughes.