MFI cold start injector seal?
 

I pulled off my Cold start injecters yesterday because one of them had a pinhole leak. I used a touch of JB weld over the hole but now I have to reinstall them. They had some sort of red gunk on the "threads" does anyone know what that stuff was and what I should use to seal the injectors to the stack?

BTW I've got spark now.. it was coroded points

I bet it was red silicon. I never used any sealant on the cold start injectors, just a press fit.