[ERA Chas]

Rick,
The copper based anti-seize I've used is made by Lubro-Moly and is availible from the German car catalogs. [Porsche, BMW] It worked very well but showed a thinner consistancy after removing the knock-off or sparkplugs. It claimed to have high heat resistance. The BEST product I've used and the one I'll stay with is sold by Griot's Garage. It too has German origin but is ceramic based, is white in color, and remains that way even after several re-uses. It has something like 2000 deg. heat capability [!] and remains a creamy consistancy. It's perfect for sparkplugs in alum. heads and I now won't use anything else. It doesn't even cost a million bucks like everything else in his catalog! Hope you try it, I don't think you'll be sorry.