| GRADE NO | Al2O3 % | SiO2 % | Fe2O3 % | CaO % | Grain Size | Max.Operating Temperature | Density | Water Addition | APPLICATION | 
| min | max | mm | 0C | gr/cm3 | % | ||||
| RHB 251 | 25,00 | 40,00 | 8,00 | 18,00 | 0-3 | 1000 | 0,85 | 25-45 | High Temperature Insulation | 
| RHB 401 | 40,00 | 40,00 | 6,00 | 11,00 | 0-5 | 1200 | 1 | 25-45 | High Temperature Insulation | 
CASTABLES (INSULATION)
                     
                                
                            