Saltwater and Neverseize

[mquiet]

I heard last night that you should not use Neverseize on bolts for boats that are in the salt water. Is this true? Is there a better product to keep the bolts from seizing?

 

[bmac]

If I recall from my nuclear power plant days, Neverseize contains certain metallic compounds which would contribute to galvanic corrosion when applied to metal fasteners exposed to salt water.

 

[fwebster]

Brian is correct. Most anti-seize lubricants contain copper or aluminum, or both. In the presence of moisture, they can do just then opposite of their intended purpose.

Alternative is Mercury Extreme Grease (part # 92-8M0071838).

 

[rcknecht]

I use neversieze on manifold and exhaust bolts... I am in saltwater, but these bolts are not in direct contact with salt water... I have not had any problems...

 

[mquiet]

Thanks for the confirmation. Good to know. Frank, thanks for the alternative.

 

[GCHOG]

I use both Copper and Aluminum based "Loctite" brand anti-seize daily at my profession as an equipment repair tech and always have positive results. yes , I do use it on my boat. This summer I had to remove both B-3 props for repair. I had removed the props a year ago just for maintenance checks and installed them with copper anti-seize on the shafts. When I removed them this summer , the anti-seize looked like new and the props came off very easily. I do boat in both fresh and salt water. I also use it on exhaust manifold bolts. Honestly, I wouldn't think of not using it just because of the results I see daily . Just my .02 cents worth.
quote from the label:
Loctite C5-A: It prevents seizing and galling caused from heavy loads,vibration, corrosion and temperatures up to 1800d. For use with most metals, under most conditions , including cast iron and steel, nickel, copper, brass,bronze, titanium,aluminum and monel.

 

[juggernaut1]

Or the Mercury 2-4-c with PTEF which is recommended to be used for prop shaft threads, amongst other things.