Monolithic Refractories Specialist Posted in Home on 5-21-18 We are offering Mortar used for laying 30% Alumina Bricks. Al2O3 (%) – 22 Fe2O3 (%) – 2.5 PCE Orton Cone (Deg. Celsius) – 20/1564. Service Temp (Deg. Celsius) – 1350.