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