Abstract: The weather strip is designed for sealing a gap between a door frame and a door mobile across the door frame, and comprises an elongate base member having a flat bottom surface for flush mounting on a door frame, and two sides, as well as a uniform thickness rubber strip to be held by the base member. A first one of the two sides is folded over for crimping the rubber strip between the first side and the bottom surface or a second one of the two sides, the rubber strip projects away from the base member and is directed on one side by an edge of the first side and on another side by an edge of a second one of the two sides, and the edge of the one side and the edge of the second side are rounded with a radius of curvature greater than a minimum elastic radius of curvature of the rubber strip. When the rubber strip is flipped back and forth as a result of coming into contact with a two-way door frame, the rubber strip is not torn by the flipping action.