Details from the maufacturer:
GD-525 Moly Grease provides uniform and durable boundary lubrication under extreme pressure to prevent wear on the two mating steel surfaces over a wide temperature range. With a high dropping point, it will not run off from heat. It is adhesive to prevent wash out and sling off. Moly is a solid film lubricant with a low coefficient of friction and an affinity for steel and other metals. The moly decreases friction of the two counter-moving sliding surfaces by filling in microscopic pores of the metal surfaces and plating out over the surface. The fluid component of GD-525 is a blend of synthetic hydrocarbon base stocks, commonly called “synthetic oil“ (Groups IV & V). Hydro processed mineral oil or a mineral/synthetic oil blend is not used. The synthetic oil in the grease has a higher tolerance for heat than mineral oil, which means GD-525 resists oxidation and evaporation; the synthetic oil creates a stronger film of lubricant than mineral oil. In combination, the components of GD-525 provide exceptional capability to reduce friction and wear over a long period of time.