magnetic compartment powders of magnetic material such as ndfeb can be blended together with silicon and or viton while manufacturing the sealing device 490 to make the resultant sealing ring magnetic according a sealing effect can be increased by the attractive force between the sealing device 490 and the container 310 which comprises metal and or by the attractive force between the sealing device 490 and the lid 320 which comprises metal in another embodiment of a sealing apparatus illustrated in fig5 a lid 510 which is the first member of a sealing apparatus can be a cover portion of a wet bench spin dryer used in semiconductor manufacturing or of any hermetic container or enclosure which needs to be airtight a container 520 which is the second member of the sealing apparatus can be a chamber portion of the wet bench spin dryer or any hermetic enclosure which needs to be airtight a sealing device 530 is disposed between the lid 510 and the container 520 in this embodiment the sealing device 530 is fastened to the container 520 by using glue screws and other means known to those skilled in the art the sealing device 530 comprises a first sealing portion 540 a second sealing portion 550 and an internal compartment 570 formed by walls undulatingly extending between the first and second sealing portions the outer surfaces of the first sealing portion 540 form an approximately 90 degrees angle 555 with an upper sealing surface 525 of the container 520 the second sealing portion 550 has a flat surface 545 to contact with a lower sealing surface 515 of the lid 510 an internal compartment 570 contains compressible material such as air the outer surfaces 560 extending between the first and second.