Fire bricks and fire cement are special stuff used in hot places. These material important because they can handle very high temps without breaking. Fire bricks use to build fireplaces, kilns and other structure that need endure extreme heat. Fire cement on other hand, is kind of strong glue that hold fire bricks together. It also fill gaps keep heat inside and stop smoke from escape. Greatsun Aopeng makes good quality fire bricks and fire cement for many industries. If you need materials that can withstand extreme conditions, consider checking out Calcined Aluminas as well.