A high pressure, low porosity wet seal for a substrate in a fuel cell in which the seal is made up of a granular material having a particle size varying from 10 to 0.1 microns in {TAIL ~ size} bonded together with polytetrafluoroethylene to prevent leakage of {HEAD ~ the gaseous fuel} or oxidant from the cell 
A high pressure , low porosity wet seal for a substrate in a fuel cell in which the seal is made up of a granular material having a particle size varying from 10 to 0.1 microns in { TAIL ~ size } bonded together with polytetrafluoroethylene to prevent leakage of { HEAD ~ the gaseous fuel } or oxidant from the cell
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