a grommet providing triple sealing feature when mounted in an opening of a panel is disclosed . when the panel into which the grommet is mounted is between a compartment exposed to ambient conditions and a passenger compartment , a seal minimizes water , fumes , dust , and noise from entering into the passenger compartment . the triple seal , according to an embodiment , provides higher sealing forces than shown previously . the disclosed grommet can be engaged with a flat , non - flanged panel as well as a panel having a flange near the opening . the disclosed grommet has multiple longitudinal slits sawed through a tubular portion of the grommet through which the wiring harness is threaded . the cuts allow a subset of wires to be splayed out from the grommet at a different routing than the remainder of the wires in the wiring harness bundle .