Cellular glass is a new ideal building insulating material with excellent energy-efficient and fireproof property. The composition is glass, added with foaming agent and accessorial additives. It’s foamed by high temperature in foaming furnace, and then cooled down in cooling oven. It is applicable to a variety of harsh environments, and long time use without performance reduced, and service life reaching the building requirements, and fireproof performance meeting Grade A. It is praised as "permanent thermal insulating material with no need of renewal", because it is not only safe but also durable. It is widely used in building insulation, such as various kinds of roof, fire barrier, exterior walls and basement.