A method for continuously coating the inside of a continuously extruded hollow profiled bar made of elastic material and a liquid wiper and a device for removing excess coating agent from the chambers of a hollow profiled member. A hollow profiled bar is directed through a stationary supply of a liquid coating agent on a bent, arc-shaped track, whereby inner walls of the hollow profiled bar are moistened with coating agent, and the hollow profiled bar is guided along a rising track directly after running through the coating agent supply. Excess coating agent is wiped off one or plural inner walls with the aid of liquid wipers mounted inside the hollow chambers, the hollow profiled bar being continuously moved relative to the liquid wipers. The liquid wipers include at least one magnet or magnetizable material and a wiping lip that touches the inner walls while being located downstream of the coating agent supply in a zone of a sloped track of the hollow profiled bar. The liquid wipers are retained in a steady position within the track of the hollow profiled bar with the aid of counter magnet or magnetizable materials that are fixed next to the outer surface of the continuous hollow profiled bar.