Blue Hylomar was develpoed by Rolls Royce during the late 1930's and was used with great success on their aero engines and is still use today on their most modern Trent series of fan engines. It is produced under licence all over the world and I too ( like RR ) have used it with great success during my time on motor cars. For the oil problem you mention, I would agree with Larry, good preparation is essential and I would venture to suggest you use the Hylomar PL32, medium compound, if of course you plan on another reseal . . . good luck.

__________________
1993 190E 2.0L (Euro.) sold
1991. 500 SEL (Euro.)
1991. 300 CE (Euro.) sold
1993. 500 E (U.S. spec.)