Matchless,
It's a paint that as far as I know was invented in the US, by General Electric. It's used for the inside of electric motors.
You see it on the inside of industrial gearboxes as well, to seal the cast iron.
skygeek.com
Perhaps but Glyptal has a proven track record of staying put in hot oil and not affected by the expansion and contraction of an engine block heating up and cooling down.
What was the problem with the Norton engine that you are trying to solve with this product?
It is in fact a Royal Enfield 750. The cases were painted inside by the factory with a yellow sealing paint, which I presume was to seal against any porosity. This was removed when I had the parts vapour blasted & tumbled, as after sixty years it wasn't in great condition. It might just be overkill to re paint them, but I imagine they wouldn't have done them for no reason originally.
Would it stand constant immersion in hot oil?
Yes - Having put a primary inner in an oven to "clean" prior to welding, its surprising how much oil sweats out of all the pores!
www.ultraseal-impregnation.com
Are they able to deal with ancient oil impregnated castings ?Ultraseal did a great job on a head for me a few years ago.
Ultraseal Slough Impregnation Service Centre | Ultraseal GB
Seal porosity and leak paths for cast and additive manufactured components. Highest quality, technical support and service standards assured.
Sounds like a good process.
