KillerBee,

i used to work for a major gasket company for many years in their aftermarket engineering group. We always heard and knew that chrome surfaces were undesirable for sealing any kind of gaskets. Best recommendation was always to advise the installer to scrape away the chrome where ever the gasket was needed to seal. Adding chemical sealants invites other issues, such as potential for gasket to split upon clampdown -- RTV being the worst and mis-used chemical. Surface flatness and clean clamp threadings are critical.