Barium complexes were one of the first multipurpose greases. They are made by reacting barium hydroxide in a crystalline form with a fatty acid, complexing the soap with stabilizing substances and then blending with the desired amount of oil.
Textures can vary from buttery to fibrous depending on the complexing agent used. The fibrous is the most common. The dropping points range from 200 °C – 250 °C, and is fairly stable to shear and working. They are water resistant and act as fair rust preventatives. They are not very pumpable at cool temperatures, but can be made so by adjusting the base oil. Barium complex is a fairly good multipurpose grease, but is relatively expensive. These greases work very well in wheel bearings, water pumps, chassis and universal joints. They also work well as an outside gear lubricant because of water resistance and have excellent adhesive properties.
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