Copper ease v Marine grease.

[Griffin71]

I am starting to rebuild my Seagull 40 plus, however what would people recommend regarding the greasing of bolt threads
Normally I use copper eaze in nearly all of my automotive applications.
However as this engine is going to be used in quite a corrosive environment would marine grease be better
I know marine grease has a certain resistance to being washed off.

and suggestions

[Oyster 49]

I always use copper grease on threads too.

[RickUK]

I use copper grease, having run taps and dies over the threads.

Water doesn't typically get to the threads - corrosion is an interaction between the ally casting and the fastener alloys

[Griffin71]

Will go with the copper ease, used to get the old alloy steel corrosion on the old Land Rovers
I plan on getting a fair amount of grease inside the driveshaft hopefully will slow down the rotting.

[headdownarseup]

I use copper grease on all my threads too Taps and dies wherever possible on anything with a thread.

Go easy with the drive shaft though, as when you come to put things together it can easily make things that came apart suddenly NOT go together quite so easily. Grease will (to a degree) slow down the corrosion depending on what you've actually done to preserve the metal in the first place.

Jon