Castrol Molub-Alloy™ OG 968 SF Heavy (previously called Molub-Alloy 968 SF Heavy ) is a heavy duty, non-solvent containing multiservice lubricant designed for use an heavy duty applications. It is formulated to withstand the most severe environments, which may include extreme heat and dust in the summer, as well as in inclement weather, in rain, snow, sleet in winter. Molub-Alloy OG 968 SF Heavy performs also extremely well in underwater applications, with condensation, as well as seawater. Formulated to address environmental concerns, Molub-Alloy OG 968 SF Heavy is free of lead, antimony, zinc, barium and chlorinated solvents. No solvents of any kind are used in Molub-Alloy OG 968 SF Heavy Multiservice Lubricants.

• A highly refined, viscous, paraffinic petroleum derivative is the foundation of a blended base fluid with excellent natural chemical and thermal stability. Molub-Alloy OG 968 SF Heavy is compounded to flow readily in the filmforming process; yet it resists "squeeze-out" and clings tenaciously even to gear teeth in vertical orientation.
• A proprietary blend of Molub-Alloy™ lubricating solids is included to promote antiwear and load carrying properties beyond those of conventional lubricants. The select lubricating solids work synergistically with chemical antiwear and extreme pressure (EP) additives, to reduce contact temperatures, while providing excellent antiweld protection under extreme pressure and shock loading.
• Rust and oxidation inhibitors are included in the formulation to protect the equipment and lubricating film against the elements in severe climates. The select grade and size distribution of the lubricating solids are intended to provide Molub-Alloy OG 968 SF Heavy with multiservice characteristics for applications ranging from heavy duty open gears, to antifriction and Journal bearings.