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.