A strut top mount utilizing a mount dome including lightweight polymeric material for the primary structural member as a replacement for the steel material that is traditionally used. The utilization of the polymeric material is possible because the factors associated with strut top mount stresses are successfully managed by a strategic geometric arrangement of the components thereof and the body structure to which it interfaces, as for example by the mount dome being configured to seat in abutting relation to a support shell of the strut tower, wherein the polymeric material is placed under compression. A load bypass is provided in the event of a maximum jounce event.