Cationic UV jet-inks offer many desirable features. This includes, strong adhesion to a range of media, fast cure response in air and low residual odour. Despite this, there remains the need for greater formulation diversity, mainly due to limited raw material supply and viscosity restrictions. For example, the creation of very hard, scratch and chemical resistant films, whilst maintaining a low ink viscosity, is somewhat challenging.Silane chemistry has been used in the coatings industry for many years to provide hard films with high heat and solvent resistance. A large number of these reactive silanes are low enough in viscosity to be attractive to the jet-ink formulator. But due to a cumbersome reaction process, involving heat, hydrolysis and condensation, the inclusion of such materials has been limited.This paper looks at how silane chemistry may be incorporated into cationic UV jet-inks. Through photoinitiation, the silane curing mechanism is simplified to a one-step process. By doing so, formulation latitude is increased and improvements to film properties are made.