Abstract: A sliding door assembly for bathtubs, shower stalls and the like. The assembly includes at least one door panel, an elongated support rail member, and support mount structure for slidably mounting the door panel to the support rail member. The support mount structure includes an elongated carriage member attached to the door panel and a pair of support rollers mounted to the carriage member and engaging the support rail member. The rollers are free to move lengthwise along the carriage member as the door is open and closed. However, structure is provided to stop the lengthwise motion of the rollers just prior to the door panel reaching a closed position to brake the motion of the door panel as it is moved to the closed position.