A security panel mounting system having: a mounting unit configured to attach to a mounting surface; a securing unit configured to attach to the mounting unit to form a base fixture; a shock gasket configured to nest within the base fixture, wherein the shock gasket is configured to secure a security panel within the base fixture; and a cover configured to engage with the base fixture. A center mullion may be implemented to allow multiple security panels to be mounted within the mounting surface. One advantage is that the security panel mounting system may allow for the utilization of security panels within any window or door to enhance security. Another advantage is that the shock gasket may allow for the expansion and contraction of the security panels, as a result of changes in ambient conditions, to occur without resulting in bowing or deformation of the security panel.