The adhesion to metal surfaces of room temperature vulcanizable silicone rubber curable through condensation of silicon-bonded hydroxyls with silicon-bonded alkoxy radicals is improved by contacting the metal surface with dimethyl-formamide or an aqueous solution of glycine, removing the glycine or dimethylformamide, drying, thereafter applying the room temperature vulcanizable silicone rubber to the treated surface and allowing it to cure.
