An optical sheet suitable for use in a laminate comprising at least one glazing component. The optical sheet comprises a non-metallic multi-layer optical film that has multiple optical layers, and can be, for example, a solar energy reflective film (e.g., an infrared radiation reflective film). The multiple layers are thermally and/or otherwise fused together along all, substantially all or at least a substantial portion of the peripheral edge of at least the optical film, so as to prevent or at least substantially reduce the occurrence or degree of delamination of the multiple layers along all, substantially all, or the substantial portion of the peripheral edge of the optical film. At least the optical film can be dimensioned such that, when bonded to a glazing component, all, substantially all or at least the substantial portion of the peripheral edge of at least the optical film is positionable so as to be co-extensive with or substantially co-extensive with a corresponding portion of the peripheral edge of the glazing component to which the optical sheet is to be bonded.