Subsea thermal insulation is a protective thermal insulation coating that is applied to components subjected to cold deep-water immersion. These coatings provide thermal stability to the components and facilitate smooth operation under deep-water conditions. Subsea thermal insulation materials are mostly used in the oil & gas industries, the subsea thermal insulation materials prevent the solidification of petroleum products and ensure the seamless movement of the materials. Subsea thermal insulation materials are of different types, such as polyurethane, polypropylene, silicone rubber, epoxy, and aerogels. These materials are used in various applications, such as pipe-in-pipe, pipe covers, equipment, and field joints.