Black Jack is an extreme duty Anti-Seize Compound containing 20% sub micron molybdenum disulfide dispersed in a synthetic lubricant base. Rust and oxidation inhibited to assure superior protection and performance during its' working life. The products cold black coloration distinguishes Black Jack from the lower moly content anti-seize varieties. Product does not contain carbon or powdered metal. Black Jack never hardens and maintains its buttery texture over a wide temperature range