Cerakwool Bulk Refractory Fill
Up to 1,260°C
Main applications
- for filling joints and complex shapes
- with excellent thermal shock resistance for a crack-free refractory lining
Key Features
Extreme heat and continuous service (1,260°C)
Classified at 1,260°C with strong refractory performance — stable in continuous service between 1,000 and 1,100°C
Flexible, fills gaps completely
A soft cotton-like fiber that packs expansion joints and awkward pipe gaps without voids
Low conductivity and low heat storage
Lighter and lower in stored heat than fire brick — shortening furnace heat-up time and maximising energy efficiency
Chemically stable inorganic material
Acid- and alkali-resistant inorganic material — corrosion-free, with long-term reliability in harsh chemical processes and hot plant
The base material for formed products
The quality raw material from which ceramic board, paper and vacuum-formed shapes are made
Specifications
| Service temperature | Up to 1,260°C |
| Primary composition | High-purity silica (SiO₂) and alumina (Al₂O₃) melt-spun fiber |
| Product form | Bulk cotton (loose fill) |
| Key properties | Flexibility, gap filling, low heat storage, inorganic chemical stability |
Applications
Industrial furnaces & kilns
- •Filling expansion joints in furnace walls and roofs
- •High-temperature sealing of kiln doors and manholes
High-temperature sealing
- •Joint packing on hot equipment of all kinds
- •Maintaining gas-tightness at duct connections
Automotive & energy
- •Insulation of exhaust after-treatment devices
- •Insulation around boiler heat exchangers
Batteries & semiconductors
- •Local filling in very high-temperature firing furnaces
- •Sealing internal gaps in precision heating equipment
Notes
- ※Fine fiber particles are released during installation — protective equipment is essential. Where personnel safety comes first, we recommend the bio-soluble bulk product.
- ※We advise on fiber length (spun or blown) to match your site conditions, assuring the best insulating seal.