Calcium naphthenate is primarily used as a metallic soap in the formulation of lubricating greases, where it acts as a thickening agent. It provides good high-temperature stability and water resistance, making it suitable for use in industrial and automotive greases exposed to harsh conditions. It is also employed as an emulsifier and gelling agent in certain oil-based systems. In the petroleum industry, calcium naphthenate can form undesirable deposits in crude oil processing, but in controlled applications, its gelling properties are utilized in specialty products such as rust inhibitors and waterproofing compounds. Additionally, it has been used in some pesticide formulations as a dispersing agent.