Hot-dip galvanizing is a vertical form of strip galvanizing, in which furnace temperatures of up to 1350°C can be reached. Different parts of the installation require a very wide range of different qualities in the refractory lining.

The direct-fired section uses high-quality polycrystalline high-temperature insulation wool and fire bricks to withstand the temperatures and chemical attack. Other materials used include ALSITRA high temperature insulation wool products, refractory concretes, and lightweight refractory bricks.