Graphite/calcium fluoride formulation, which is free from lead, copper, sulfur and their compounds. It contains no free metals.LOCTITE LB 8070 is a black, graphite/calcium fluoride formulation, which is free from lead, copper, sulfur and their compounds. It contains no free metals and is compatible with stainless steel and other nickel alloys. It is used in many industries. This product is typically used in applications with an operating range of -20.2 °F to +2,399 °F (-29 °C to +1,315 °C).