Fire bricks or refractory bricks are constructed with fire clay that can resist high temperatures as they are exposed to very high temperatures during the burning process. Although their construction is similar to normal bricks, they can withstand high temperatures without breaking or cracking. These types of bricks can be used to line the interiors of furnaces, kilns, chimneys, wood-fire ovens, etc. Listed in the following slides are the top 3 properties of fire bricks to look out for: