The silica was extracted to make firebricks at the "Dinas Firebrick Co." in Pont Walby. These firebricks have also used to help keep the base brickwork intact. The furnaces are made with "Cumbernauld" firebricks and feature a large amount of slag build-up. The boiler was enclosed in a sealed casing of steel, lined with firebricks. Completion was delayed when her boilers had to be rebuilt because of defective firebricks. The upper part of the stove is often insulated with rock wool and firebricks. They were established for the manufacture of coke, salt and firebricks. A range of other materials find use as firebricks for lower temperature applications. In 1972, Britain's Tate Gallery acquired Andre's "Equivalent VIII", an arrangement of firebricks. Common firebricks can be used in a similar manner to cover a shelf. Firebricks lining the furnace and chimney were made from good quality local fireclay. The vehicle was stencilled on the side as "Palletised firebricks Dandenong to Yallourn and Morwell".