A gasket “system” consisting of a high-density core unitized with “tailored” stress-risers, permits the user of choosing rigid and/or lighter component flange castings; with a potential reduction of the number of capscrews needed for a durable flange joint. Subsequent loading necessary for a conventional compression seal could therefore be reduced, allowing a further reduction in tensile strength requirements for the mechanical fasteners. The elimination, or relief, of tight flange surface-machining tolerances are then possible, reflecting a cost savings.