Unibond A25 Refractory Fireclay Mortar for Ovens and Fireplaces

Unibond A25 – Ready-to-Use Alumina-Containing Fire Cement

This air-setting, refractory cement based on quartzite is specifically designed for use in industrial applications as well as in masonry and civil construction. It is used without the addition of water for thin layers and is frequently used in chimney construction, particularly when laying refractory materials in combustion chambers.

Chemical Composition:

• Al₂O₃ + TiO₂ [%]: 14
• Fe₂O₃ [%]: 1,2

Physical Properties:

• Maximum Operating Temperature [°C]: 1350

Ready-to-Use Mortars for Refractory Applications are often preferred to other products because they are easy to work with and offer high performance in operation. At the Unistara plant, where raw materials are mixed automatically, an in-house laboratory ensures continuous quality checks of the final product. This guarantees a high quality standard.

In addition to material characterization tests, regular checks for drying shrinkage and joint load-bearing capacity are carried out. Particularly important is the precise testing of workability to ensure the extreme user-friendliness of these mortars.