Molded articles are designed to be received within a space between a window frame of a vehicle body panel and a window panel attached thereto. The first barrier layer consists of a material having a first bandgap and a first relative permittivity. The overall cool-down speed of the actuator, and hence the speed with which the passive bend layer returns to its quiescent position can be controlled by controlling the proximity of the heat conductive layer to the actuator’s heater during fabrication. The second casing has a second receiving space and a second hole disposed a second side thereof, wherein the second receiving space is intercommunicated with the second hole.