A window assembly comprising: an outer window pane; an inner window pane; a window frame; a window retention clip; and a seal assembly, said seal assembly including a seal physically restraining edges of said outer window pane and said inner window pane, said seal comprising a portion extending around a peripheral portion of said inner window pane and receiving the peripheral portion of said inner window pane to contact an outer surface of the inner window pane and an inner surface of the inner window pane; a stiffening ring made integral with said seal, wherein said seal defines a cutout portion extending between the outer window pane and the inner window pane and receiving said stiffening ring, the stiffening ring physically restraining the seal to keep the seal in constant contact with an inner surface of the outer window pane and the outer surface of the inner window pane; and a clamping ring, the window retention clip causing the clamping ring to restrain said seal about said outer and inner window panes (202, 204) and to restrain said stiffening ring, wherein said clamping ring comprises an L-shaped cross-section, a first leg of the L-shaped cross-section contacting a portion of said seal between the first leg and the inner surface of said inner window pane, and a second leg of the L-shaped cross-section extending to the cutout portion to restrain said seal between the second leg and the inner window pane and to retain said stiffening ring in the cutout portion. an outer window pane; an inner window pane; a window frame; a window retention clip; and a seal assembly, said seal assembly including a seal physically restraining edges of said outer window pane and said inner window pane, said seal comprising a portion extending around a peripheral portion of said inner window pane and receiving the peripheral portion of said inner window pane to contact an outer surface of the inner window pane and an inner surface of the inner window pane; a stiffening ring made integral with said seal, wherein said seal defines a cutout portion extending between the outer window pane and the inner window pane and receiving said stiffening ring, the stiffening ring physically restraining the seal to keep the seal in constant contact with an inner surface of the outer window pane and the outer surface of the inner window pane; and a clamping ring, the window retention clip causing the clamping ring to restrain said seal about said outer and inner window panes (202, 204) and to restrain said stiffening ring, wherein said clamping ring comprises an L-shaped cross-section, a first leg of the L-shaped cross-section contacting a portion of said seal between the first leg and the inner surface of said inner window pane, and a second leg of the L-shaped cross-section extending to the cutout portion to restrain said seal between the second leg and the inner window pane and to retain said stiffening ring in the cutout portion. a seal physically restraining edges of said outer window pane and said inner window pane, said seal comprising a portion extending around a peripheral portion of said inner window pane and receiving the peripheral portion of said inner window pane to contact an outer surface of the inner window pane and an inner surface of the inner window pane; a stiffening ring made integral with said seal, wherein said seal defines a cutout portion extending between the outer window pane and the inner window pane and receiving said stiffening ring, the stiffening ring physically restraining the seal to keep the seal in constant contact with an inner surface of the outer window pane and the outer surface of the inner window pane; and a clamping ring, the window retention clip causing the clamping ring to restrain said seal about said outer and inner window panes (202, 204) and to restrain said stiffening ring, wherein said clamping ring comprises an L-shaped cross-section, a first leg of the L-shaped cross-section contacting a portion of said seal between the first leg and the inner surface of said inner window pane, and a second leg of the L-shaped cross-section extending to the cutout portion to restrain said seal between the second leg and the inner window pane and to retain said stiffening ring in the cutout portion.