Not Ranked
Klingersil™ C-4401 is recommended by the manufacturer for automotive use with fuels and lubricants. It is made in Austraila and it is not cheap. I have used this material in various thickness in my work at GE since 1988. So far I have not had a single minute of plant downtime due to a gasket problem with thousands installed. We use it with one material that attacks everything else tested (yes I lab test first). The only limitations I know of are "high temeratures" and most concentrated "strong" acids. In ANSI service application this material's blow out rating is very high. I have personally hydraulically tested 1" ring gaskets to 3,000 psig at 90°F. The original gaskets I believe SAI used, marked Miller in LA, seem to be cellulose fiber and tended to get "sucked into" the port to create massive air leaks.
Somewhere on CC there is an old thread by someone supplying this same material I think for Autolite™ In-line 4V carbs.
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Dan Case
1964 Cobra owner since 1983, Cobra crazy since I saw my first one in the mid 1960s in Huntsville, AL.
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