Re: water pump sealer?
Marprox and M are obsolete. 3M #847 is the stuff today. The nearest automotive you will find for the BRP Gasket sealer is Aviation Permatex, the one that comes in a can with a brush. But it is NOT the same, even if only for pleasantness of use. There is also Perfect Seal #4 if you can find it. (Mercury Dealers) That's about the same as BRP.