A SYSTEM CONSISTING OF A FIRE SAFE SEALING AND AN APERTURE IN A FLOOR OR A CEILING OF A BUILDING, AN INSULATION ELEMENT FOR SUCH SYSTEM, A METHOD FOR SEALING AN APERTURE IN A FLOOR OR A CEILING OF A BUILDING AND A RESPECTIVE CONSTRUCTION KIT

The invention relates to a system consisting of a fire safe sealing (1) and an aperture (2) in a floor (3) or a ceiling of a building, through which a pipe (4), a cable or the like is guided, the ceiling or the floor (3) having an upper surface (5) and a lower surface (6), whereby the fire safe sealing (1) consists of at least one non-combustible insulation element (8), preferably made of mineral wool and being bendable with respect to at least its longitudinal axis, having a length (I) and/or a width being longer than a length (L) and/or a width of the aperture (2), whereby the difference(s) of the length (I) of the insulation element (8) relative to the length (L) of the aperture (2) and/or the width of the insulation element (8) relative to the width of the aperture (2) is adjusted so that the insulation element (8) inserted into the aperture (2) does not extend beyond two planes defined by the upper surface (5) and the lower surface (6) of the ceiling or the floor (3).