The invention relates to a method for producing an electromagnetic shielding gasket. The task is accomplished, according to the invention, through a method according to claim 1 as well as an electrical apparatus having a corresponding gasket according to claim 6. Advantageous further developments are described in the dependent claims. Method for producing an electromagnetic shielding gasket by means of a shielding substance that contains a silicone plastic mass, electrically-conducting components, and components that are expandable under the influence of heat, in which method the gasket compound is dispensed onto a housing and/or printed circuit board and/or housing parts, and after and/or during the dispensing is treated with heat, thereby obtaining its desired, predetermined expansion and/or shape.