On Mon, 18 May 2009 06:19:52 -0700 (PDT), wrote:

On May 16, 8:37*am, mark wrote:
What are the different applications for the 2 different antiseize
compounds commonly available. One is *gray colored and the other is
copper based. Most of my stuff is aluminum with stainless fasteners
around salt water, which would be better. I thought copper would cause
aluminum to corrode around salt water.

I've heard the copper based is the 'worst' to use on aluminum, the
grey goo is usually a triple formula of aluminum-copper- and
somethingorother.

The 'best' for steel-aluminum is supposedly zinc-based anti-seize.

The triple-base grey goo seems to work OK on aluminum-steel.

Dave

The grey stuff I use is a nickel-based compound; it supposedly works
at higher temps than the copper stuff, but most of the mechs here
prefer the copper. I use the copper all the time on my spark plug
threads (steel into Al heads), and have had no problems in 20+ years.

Joe