Castables are a type of refractory material used in high-temperature applications. They are made from a mixture of fine aggregates, bonding agents, and additives, allowing them to be molded into various shapes. Once set, castables can withstand extreme heat and are commonly used in furnaces, kilns, and other industrial equipment. These materials are often preferred over traditional bricks because they can be poured into complex shapes, reducing the need for joints. Castables are available in different formulations to suit specific temperature and chemical resistance requirements, making them versatile for industries like metallurgy and ceramics.