A method for reducing a force for closing a door in a door frame, which comprises: a seal assembly (10, 20, 30, 40, 50, 70, 90, 110, 120) is mounted on the active material based on either the door or the door frame, wherein the seal arrangement on the basis of active material, an active material ( 12, 22, 42, 52, 74, 92, 124); is the active material (12, 22, 42, 52, 74, 92, 124) is enabled and at least one attribute in response to an activation signal changes, whereby the change in at least one property of a modulus property and / or a shape of the seal assembly (10, 20, 30, 40, 50, 70, 90, 110, 120 changed) on the basis of active material; the door is closed and locked against the door frame; and said active material (12, 22, 42, 52, 74, 92, 124) turned off and a pressure seal between the door and the door frame is increased, ...