Abstract: A decorative security panel assembly for insertion into an opening of a door or an opening of a window. The assembly can include a polymer security with a low-moisture content of no more than five wt %, such that the polymer security grille does not produce condensation within the assembly. A seal can be disposed about the polymer security grille. A translucent panel can be disposed over each side of the polymer grille and engaged with the seal. An air space can be formed between the two translucent panels, with the polymer security grille disposed within the air space. A first frame can be engaged over one of the translucent panels, while a second frame is engaged over the second translucent panel, forming a frame assembly. The frame assembly can be inserted into an opening of a door or an opening in a structure.