Abstract: A method can be used for fire-resistant sealing of an opening in a wall or ceiling, through which a line is passed. The method involves cutting a strip-shaped fire protection bandage to a length corresponding to a circumference of the line, with or without an overlap. The fire protection bandage contains fire-retardant and/or intumescent material. The method then involves placing the cut-to-length fire protection bandage around the line, to form a layer which only partially protrudes outward from the opening. The method further involves annularly applying a putty to part of the fire protection bandage protruding from the opening, to form a putty ring of a slightly larger outer diameter than the opening diameter, such that the putty ring closes the opening and extends slightly beyond the edge. The method finally involves pressing the putty ring against the fire protection bandage and the opening edge, to seal the line feedthrough.