[JFP in PA]

In Europe, anti-seize compounds are chemically different than the ones you get here, as ours are known to be toxic metallic compounds; so they don't use theirs on electrically conductive surfaces like spark plugs as the EU versions can interfere with conductivity. Anti-seize compounds in the US are both electrically and thermally conductive, so they can be used on such applications.

As for torque specs, they should always be on fasteners with some type of lubrication such as specialty lubes like ARP Assembly Lubricant, or an anti-seize compound. ARP published an extensive white paper on the differences in actual achieved torque, and fastener to fastener achieved torque consistency with and without some type of lubricant being used; while it is a long read, but a real revelation about the correct way to achieve correct torque on fasteners. A little lubrication, be it a specialty product, thread locker, or anti-seize makes a considerable difference in obtaining the desired clamping force; and on some applications like Porsche flywheel bolts, which are torque to spec then + 90 degrees additional rotation, makes tightening the fasteners a lot more achievable without killing yourself in the process.