The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of three-dimensional printing. In one example, a multi-fluid kit for three-dimensional printing can include a binder agent and an adhesion promoter agent. The binder agent can include water and latex particles in an amount from about 5 wt % to about 30 wt % based on the total weight of the binder agent. The adhesion promoter can include water and an adhesion promoter that includes catechol or a non-polymeric catechol derivative.