Copper anti-seize not good for aluminum?

[wwheeler]

I saw a thread in the drivetrain section that was talking about anti-seize for aluminum. The statement was made that copper based anti-seize is not good for aluminum and that nickle based is best.

What happens when you use the copper-based anti seize for steel hardware in aluminium threads? I have used copper anti-seize in a few places already including the spark plugs. Is the effect so bad that I should remove all of the pieces?

Thanks for the input.

[66andBlue]

This is from the Permatex web site:
http://www.permatex.com/products/Automotive/lubricants/specialty_lubricants/Permatex_Copper_Anti-Seize_Lubricant_b.htm

A premium quality copper anti-seize and thread lubricant .....
Suggested Applications: Spark plug threads installed in aluminum, exhaust manifold bolts, engine bolts, oxygen sensors, knock sensors, thermostat housing bolts, fuel filter fittings, and battery cable connections

[Benz Dr.]

Hey, an industrial millwright guy working in the nuclear industry told me that years ago. I figured if anyone should know what they were talking about it would be someone like this so I followed his advice. He told me without any hesitation that nickel is best on aluminium but I can't remember what the reason was at the time.
 It's one of the reasons I prefer Bosch plugs because they're nickel plated as opposed to the zinc coated Champions.

 I use nickel base which seems to work OK. Maybe the copper based stuff is OK too. Probably best on high heat applications but I've seen this heavy duty copper stuff made by Wurth around brake repair shops so it must work for that too.

Regardless of all of this, use something. It will pay off in the long run.

[mdsalemi]

http://www.henkelna.com/

That's the Loctite website, and there (with a little searching; who designed that site??) you can find all you need to know about thread sealing and anti-seize compounds.  They have quite a few application-specific products out there depending on use.  For example, remember that Pagoda pulled out of the Neckar River in Germany?  There is a Marine-Grade thread sealant that would have helped on that one...

I generally use their Silver-Grade Anti-Seize--heavy duty, general purpose, high temperature and pressure.

I bought a tub of it at Grainger's a few years ago, and I suspect I could lend it to all of you and still have enough to last my lifetime.  The testing of this on the data sheet includes steel into aluminum, and copper as well--so I would call this "general purpose".

[wwheeler]

Thanks for the replies. I have the Permatex copper anti-seize so I guess I am OK.

It sounds like for everyday use, copper anti-seize in aluminum is OK. The best from what I read, would be nickle based. If this were an extreme environment use like an aerospace application, the copper might then cause problems. Next time I'm out, I'll look for the nickle based.

Nothing but the best for my 111. Who needs problems!