Abstract: A sealing system suitable for equipping a cryogenic apparatus used for transforming or storing food, medical or biological products, characterized in that:—the sealing system comprises a first part, made from a soft and resilient material, constituting a shape, suitable for being pressed between two elements of the apparatus to form a seal;—said first part comprises, within the structure of same, one or more magnetic metal plates;—the sealing system further comprises a second part, constituted by one or more magnets, capable of being positioned in the structure of the machine, at the location or locations that need to support a seal, said magnets preferably being spaced at regular intervals.