K-Y Jelly (Rebranded as Knect in the United Kingdom) is a water-based, water-solublepersonal lubricant, most commonly used as a lubricant for sexual intercourse and masturbation. A variety of different products and formulas are produced under the K-Y banner, some of which are not water-soluble.
History
The origins [and meaning] of the brand name 'K-Y®' are unknown. Two popular myths are that (1) it was created in Kentucky and (2) the letters represent the key ingredients used to make the lubricant. ... [W]e can confirm that neither of these myths are true ...[1]
The product contains no spermicide and thus cannot be used to prevent pregnancy. A formulation containing nonoxynol-9 was removed from the market after the spermicide was found to facilitate the spread of HIV.[6]
It is used by dentists to cover composite restorations when light curing. This prevents the oxygen inhibitation layer which causes marginal discolouration of restorations.
It has been noted as an alternative to conventional ultrasound coupling gel.[8]
Other
It is also used by special effects technicians to create a "slimy" appearance or simulate saliva for animatronic monsters, most notably the Alien series.[9]