The substantially porosity free metallic coatings/layers/patches are applied to {TAIL ~ polymer or polymer composite substrates} to provide, enhance or restore {HEAD ~ vacuum/pressure integrity} and fluid sealing functions 
The substantially porosity free metallic coatings / layers / patches are applied to { TAIL ~ polymer or polymer composite substrates } to provide , enhance or restore { HEAD ~ vacuum / pressure integrity } and fluid sealing functions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH