Either the lead based (grey) or the copper based anti-seize works well in a
salt water environment. They both provide two essential properties anti
galling lubrication and a moisture barrier. Although other products like
sealants provide a moisture barrier, they do not provide the high pressure
lubrication anti-seize offers. This is important to note especially in a
stainless bolt in a stainless hole.
Steve

"mark" wrote in message
...
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.