Keratuff boasts an extraordinarily high strength-to-density ratio, making it perfect for thin-walled structures like launders or runners. It possesses a closed pore, fine microstructure, resulting in superior thermal insulation attributes. When utilized as a launder, it substantially minimizes the molten metal's heat losses and prevents easy formation of skull. Keratuff is non-reactive to aluminum, ensuring a clean, smooth, and swift flow of metal. Such features prevent freezing of the metal in well-managed operations, obviating the need for cleaning. You can effortlessly patch Keratuff by hand using keratuff itself, enhanced by fibres protruding from broken surfaces, although fibres do not protrude from the surface of cast or plastered surfaces. This process is quick to dry and does not require preheating or drying. It can be easily cut or machined and is free from asbestos and non-toxic. The above elucidates that Keratuff is fundamentally better than dense castables, possesses all the essential traits for aluminum launders, and should be handled differently. It should be used as a durable lining and not as a disposable material. Comprehensive technical specifications can be found in the Keratuff datasheet.

A coating of Aluminium Non-Wetting Paint can be added to enhance the non adhesion of a film of aluminium on the launder.