Abstract: A pair of V-shaped springs pointing toward each other have hook shaped ends connected into the ends of a sealing rail positioned across the bottom edge of a door leaf. The upper end of one spring is anchored to the door and the upper end of the other spring is guidingly connected to protrude beyond the edge of the door. An outwardly biased lever actuator connected on the edge of the door contacts the door frame when the door is closed and urges the protruding spring end inwardly and moves the sealing rail through the pair of springs laterally and downwardly into sealing engagement with the floor to seal the air gap beneath the door.