A method for making a ceramic sanitary ware product (M) comprises at least the following steps: applying a uniform layer (S) of bonding material comprising a high-viscosity fluid mixture to at least one surface (2) intended to be joined to at least a second part (M3) of the sanitary ware product (M); joining the second part (M3) of the sanitary ware product (M) to the first part (M2) along a joining zone defined by two respective contact surfaces (2, 3) of the selfsame parts (M2, M3) with the layer (S) of bonding material interposed between them; drying the sanitary ware product (M) thus obtained; immediately after the step of joining the two parts (M2, M3), there is a step of applying, through the agency of respective means (4), a flow (F) of electric charge uniformly distributed at least along the joining zone at a predefined intensity (A) and for a predetermined length of time (T) so as to increase mechanical strength at least at the joining zone.