NOVELTY - A gasket admixture, comprises: (a) fluoroelastomer particulate derived from vinylidene-fluoride, hexafluoropropene, and tetrafluoroethylene, the fluoroelastomer having a Mooney viscosity of 25-75, fluorine (65-69 at. wt.%), fluoroterpolymer (at least 90 wt.%), and halogenated crosslink sites; (b) curing agent of 0.5-20 parts per 100 parts by weight of the fluoroelastomer particulate; and (c) magnesium oxide (MgO) reduction-agent particulate of 5-50 parts per 100 parts by weight of the fluoroelastomer particulate.    USE - In application including fuel cell (claimed).    ADVANTAGE - The gasket admixture affords advantages over gasket admixture among those known in the art, including at least one of excellent conformability, good high temperature robustness, excellent resistance to electrolytic and moisture attack, low permeation rate, strength with resiliency, abrasion resistance, solvent resistance, good tensile and elongation properties, reduced cost, and good adhesion to metals, graphite, composites, and other materials having a high surface tension.    DETAILED DESCRIPTION - A gasket admixture, comprises: (a) fluoroelastomer particulate derived from vinylidene-fluoride, hexafluoropropene, and tetrafluoroethylene, the fluoroelastomer having a Mooney viscosity of 25-75, fluorine (65-69 at. wt.%), fluoroterpolymer (at least 90 wt.%), and halogenated crosslink sites; (b) curing agent of 0.5-20 parts per 100 parts by weight of the fluoroelastomer particulate, where the curing agent crosslinks the fluoroelastomer particulate to generate cured fluoroelastomer and hydrogen ions; and (c) magnesium oxide (MgO) reduction-agent particulate of 5-50 parts per 100 parts by weight of the fluoroelastomer particulate, the metallic oxide reduction-agent particulate having particle sizes less than 250 mesh, the magnesium oxide having a BET (Brunauer, Emmett, and Teller method) surface area of 40-70 m2/g. An INDEPENDENT CLAIM is included for a fuel cell (90), comprising: a bipolar plate (92); a membrane electrode assembly; and a gasket (100) interposed between the plate and the assembly, the gasket cured from the admixture of (a), (b), (c) and (d) inert particulate of 10-50 parts per 100 parts by weight of the fluoroelastomer particulate, the inert particulate having particle sizes less than 250 mesh.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the portion of the fuel cell assembly.    fuel cell (90)    bipolar plate (92)    gasket. (100)