Heavy-duty, temperature-resistant,petroleum-based lubricant compoundfortified with graphite and metallic flake.Will not evaporate or harden in extremecold or heat. Use during assembly toprevent seizing, galling and corrosion.For use in assemblies up to 1600F(871C). Tested to Mil-PRF-907E.Suggested Applications: For easyremoval of spark plugs, cylinderhead and exhaust head bolts.