The invention relates to an article comprising at least one polymeric substrate assembled on at least one layer of silicone polymer, characterized in that at least one of the polymeric substrate or of the layer of silicone polymer has been brought into contact with particles of titanium dioxide, magnesium oxide and/or zinc oxide, before assembly of said article, and in that at least one of the polymeric substrate or of the layer of silicone polymer has been brought into contact with water before or after assembly of said article. The invention also relates to a method of preparing said article, as well as the use of particles of titanium dioxide, magnesium oxide and/or zinc oxide, for improving the adherence between a polymeric substrate and a layer of silicone polymer.