NOVELTY - Production of edge-sealed fuel cell membrane electrode assembly comprises; (i) providing membrane electrode assembly lay-up; (ii) positioning an annular layer of thermoplastic (30) adjacent to the anode- and cathode- side fluid transport layer (20); and (iii) applying pressure and heat to melt impregnate the thermoplastic into the fluid transport layer(s) and bond the fluid transport layer(s) to the polymer electrolyte membrane (11).    USE - For making edge-seal fuel cell membrane electrode assembly used in fuel cells.    ADVANTAGE - The assembly allows bonding and sealing of fuel cell membrane electrode assembly in one step.    DETAILED DESCRIPTION - Making edge-sealed fuel cell membrane electrode assembly comprises:    (a) providing membrane electrode assembly lay-up;    (b) positioning an annular layer of thermoplastic adjacent to the anode- and cathode- side fluid transport layer; and    (c) applying pressure and heat to melt impregnate the thermoplastic into the fluid transport layer(s) and bond the fluid transport layer(s) to the polymer electrolyte membrane.    The membrane electrode assembly lay-up comprises anode catalyst material layer (12), cathode catalyst material layer, anode-side fluid transport layer, and cathode-side fluid. The anode catalyst material layer is in contact with portion(s) of the anode face of the polymer electrolyte membrane. The cathode catalyst material layer is in contact with the portion(s) of the cathode face of the polymer electrolyte membrane. The anode-side fluid transport layer is in contact with the anode catalyst material layer. The anode-side fluid transport layer has outer perimeter onto coincident with the outer perimeter of the polymer electrolyte membrane. The cathode-side fluid is in contact with the cathode catalyst material layer and has outer perimeter non-coincident with the outer perimeter of the polymer electrolyte membrane.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross section of the assembly.    Catalyst coated membrane (10)    Polymer electrolyte membrane (11)    Catalyst material layer (12)    Fluid transport layer (20)    Layer of thermoplastic (30)    Sealing area (100)