A process for production of an assembly including several silicone elements crosslinked by polyaddition of .ident.Si--H units onto .ident.Si-alkenyl (preferably .ident.Si-vinyl) units, the elements adhering to one another without detracting from their mechanical properties. The process includes: (I) forming (1.sup.st coating) a silicone element (i) with a liquid silicone preparation (i) containing polyorganosiloxanes (POS) A with .ident.Si-vinyl units, (POS) B with .ident.Si--H units, a platinum catalyst C; (II) crosslinking so that (i) has a surface density SD of unreacted, residual vinyl, per nm.sup.2, of 0.0100.gtoreq.SD.gtoreq.0.0040; (III) optionally repeating steps (I) and (II) n times to give n elements (i) that adhere to one another; (IV) forming (2.sup.nd coating) a silicone element (ii) with a liquid silicone preparation (ii) of the same type as described above; (v) crosslinking to give crosslinked (ii) that adheres to (i).