Re: Engine case sealer?

here is the now superceded Mil-Product spec for this stuff:
http://assist.daps.dla.mil/docimages/0000/74/12/7194.PD9
you want type II, Class C. Manganese cure, faying surface grade
polysulfide.

There is now an SAE spec for this stuff, SAE-AMS-8802

Pro-Seal, beloved (not!) of many RV builders is the same chemistry,
just thicker. You could use the class A stuff, and thin it with
Toluene.

Another poster mentioned what sounds to me like Loctite Gasket
Eliminator, good for up to 200 deg Celsius. That oughta do it, and
it's a whole lot easier to find than the polysulfide.

Volkswagen engine builders use Gascacinch, Yamabond, and some german
goo who's name escapes me at the moment to seal similar faying surfaces.

.

Relevant Pages

  • Re: Engine case sealer?
    ... you want type II, Class C. Manganese cure, faying surface grade ... There is now an SAE spec for this stuff, ... it's a whole lot easier to find than the polysulfide. ... Volkswagen engine builders use Gascacinch, Yamabond, and some german ...
    (rec.aviation.homebuilt)
  • Re: Engine case sealer?
    ... you want type II, Class C. Manganese cure, faying surface grade ... it's a whole lot easier to find than the polysulfide. ... Volkswagen engine builders use Gascacinch, Yamabond, and some german ... Do nor use RTV to seal crankcase halves! ...
    (rec.aviation.homebuilt)
  • Re: Engine case sealer?
    ... you want type II, Class C. Manganese cure, faying surface grade ... it's a whole lot easier to find than the polysulfide. ... Do nor use RTV to seal crankcase halves! ... with RTV silicone on the studs and under the cylinder flange nuts. ...
    (rec.aviation.homebuilt)