These sealing areas are preferably made by coating or impregnating these areas of the substrate with {HEAD ~ a silicon carbide powder} bonded together with {TAIL ~ about 2%} of Teflon or Teflon like polytetrafluoroethylene material to hold the powdered material in its compacted condition 
bonded together with
These sealing areas are preferably made by coating or impregnating these areas of the substrate with { HEAD ~ a silicon carbide powder } bonded together with { TAIL ~ about 2 % } of Teflon or Teflon like polytetrafluoroethylene material to hold the powdered material in its compacted condition
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH