When clamped between {HEAD ~ flange surfaces}, the edge coating engages, conforms to, and seals against the flange surfaces to provide a seal against both interfacial and intersticial migration of {TAIL ~ fluid} past the gasket 
When clamped between { HEAD ~ flange surfaces } , the edge coating engages , conforms to , and seals against the flange surfaces to provide a seal against both interfacial and intersticial migration of { TAIL ~ fluid } past the gasket
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH 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 OTH OTH OTH