Never-Seez^® Pure Nickel Special, Nuclear Grade, is specially tested and certified pure for use in nuclear power plants. Each production lot of Nuclear Grade Never-Seez^® is tested for contaminants of sulfur, halogens, and low-melt metals, and each container is labeled with a lot number that certifies purity. Pure Nickel Special, Nuclear Grade, is a superior, high-temperature, anti-seize, and extreme-pressure lubricant containing flake particles of pure nickel, graphite, and other additives in a special grease carrier found to enhance anti-seize performance. It is recommended for use when applications prohibit the presence of copper, especially when resistance to corrosive acidic caustic solutions is required. A special, high-quality grease with graphite, pure nickel, and other additives. Contains no molybdenum disulfide, lead, or mercury except as trace elements.