A magnetic attachment device comprises a pad, the pad including abase, a backing plate mounting a plurality of magnets, and a top plate. Thebase isconnected to the backing plate and the top plate is connected to the backingplate,the top plate being connected to the backing plate by fasteners, and the padfurthercomprises flexible sealant situated in a void formed between surfaces of thebaseand/or the magnets and/or the backing plate.
