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M-SEAL VM500 is a self-adhesive butyl rubber based Voltage Isolation and Waterproof Membrane with a geotextile top layer, for use on slab and wall applications. Made from a special bitumen-free butyl rubber composition, the M-SEAL VM500 is an easy, clean and environmentally friendly solution for preventing the transfer of static electrical currents through concrete slabs and walls, in both wet and dry areas of application.