The disclosure relates to a molding member, for instance for automobile front window plates, as well as a method of manufacturing such molding members. The molding member has a lip section in the form of a ridge which extends throughout the entire length. The lip section bears against the surface of the window plate along the upper portion to realize a flush outer surface between the upper edge of the window plate and the body panel, but is spaced therefrom along the side portions to define a weir. The weir can be formed by deforming a predetermined location of the ridge, and prevents flow of the rain water across the molding member to preserve the driver's or passenger's sight through the window.