Abstract: An improvement in a dock seal of the type in which a movable panel in its disengaged position extends generally from the side of the dock opening toward the center of the dock opening and when engaged by the exterior of a truck is moved backwardly by the truck. The improvement is a lip panel which is attached to and runs along the inner edge of the movable panel and when not engaged by the truck extends generally away from the dock opening. The lip panel seats against a truck when the dock seal is engaged by a backing truck and moved toward the dock opening with the truck into sealing engagement of the gap between an open truck door and the truck body.