Abstract: Passive fire-suppression objects adapted for placement adjacent or in a confined area to be protected are provided and comprise a three-dimensional body presenting a surface communicating with the confined area; solid polyhalon fire-suppressing material forms all or a part of the object and is capable of releasing fire-suppressing gas from or through the object surface when heated as a result of a fire within the confined area. The solid polyhalon may be incorporated in or onto the surface of the object and can be used in wall or ceiling panels, woven material or as a solid panel. In use, heat generated as a result of a fire causes the polyhalon to pyrolize and crack, thus liberating monomer components of the polyhalon, the monomers being a fire-suppressing gas.