A security panel mounting system having a mounting unit configured to attach to a mounting surface; a securing unit configured to engage with the mounting unit wherein the engagement of the securing unit with the mounting unit forms a base fixture; a first narrow gasket and a second narrow gasket, each narrow gasket having: a narrow gasket body; a T-shaped narrow gasket handle attached to the narrow gasket body; and a gasket hollow nested within the narrow gasket body; wherein each narrow gasket handle is configured to engage with a corresponding structure within the base fixture to secure a security panel within the base fixture; and a cover configured to engage with the base fixture. An advantage is that the hollow within each narrow gasket may allow an impact to the panel to be responded more flexibly, reducing the likelihood of the mounting system being damaged from the impact.