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The invention of [otnosits] to emergency-rescue equipment can find the wide application of [dl] of hermetic sealing emergency damages before the metallic containers, the conduits, the hulls of the ship. To the technical result of [otnosits] the expansion of the range of [ispolzovani] of a device, and also an increase in reliability and effectiveness of [ispolzovani] of a device via [umensheni] of time and labor expense for its installation with conducting of emergency rescue works on the liquidation of leaks before the metallic containers, conduits, hulls of the ship. The technical result of [dostigaets] of [blagodar] so that “sealing magnetic device” contains the sealing element, which blocks the zone of [povrezhdeni] with the formation of the closed cavity and the elements of the fixation of the sealing element in the form post [nnykh] magnets. The sealing element is executed in the form the elastic matrix, before which before the chess of times to [dke] are placed post [nnye] magnets of cylindrical or so on of [mougolnoy] form, made from the alloys of rare-earth metals on basis Nd-Fe- B or Sm- Co. The surface area of matrix is general the surface area of the magnets in this case of [nakhod] t between themselves before the following dependence : S[magnita] : : S[matritsy]=1 : 4where S[magnita] - is general the surface area of magnets, and S[matritsy]. - the surface area of matrix.