Never go over to the general forum.

What I've used is black silicone. No white fungus or corrosion around the dizzy last time I looked and it's been getting sealed for about 2 years now after servicing.

If you're real keen seal up your battery terminals and they won't corrode or get that white fungus. I only did it as I had a leak down problem which it solved. Make sure you leave somewhere to boost start it if you get a bat flattery. Mines the dual battery solenoid.

Some roof and gutter is okay too according to the guy who recently fixed my TV..... stops arcing apparently. You'd have to read the label but usually okay for body work.