Ceramic Fiber Wool
UWool® Ceramic Fiber Wool is a reliable bulk insulation material manufactured from kaolin through a standardized refinement process. These bulk fibers are produced under controlled conditions to provide customers with consistent material properties for a wide range of everyday thermal management needs.
As a non-asbestos safety solution, this fiber wool is ideal for filling, packing, and sealing complex spaces in public, commercial, and residential infrastructure. Its stable thermal properties and low shot content make it a professional-grade choice for maintaining the efficiency of heating appliances and providing a dependable thermal barrier in common utility environments.
Key Applications & Benefits:
Commercial Heating Appliances: Standardized filling and packing material for commercial ovens, stoves, and food warming equipment to ensure consistent heat retention.
Residential Chimney & Flue Safety: A reliable insulation filler for chimney voids and flue gaps in home heating systems and fireplaces.
Utility Pipe Sealing: Effective for caulking and sealing expansion joints or irregular gaps in steam and hot water pipes within office buildings and apartments.
Acoustic & Thermal Comfort: Provides additional sound absorption and thermal dampening for mechanical rooms and utility spaces in residential properties.
Standardized Maintenance Filler: An easy-to-use thermal filler for corners and complex geometries in common commercial heating facilities.
| Model Code | CR3300PT | CR3300ST | CR3300HP | CR3300HA | CR3300HZ | |
| Product Grade | PT | ST | HP | HA | HZ | |
| Categorize temperature(℃) | 1100 | 1260 | 1260 | 1360 | 1430 | |
| The work temperature(℃) | < 1000 | 1050 | 1100 | 1200 | 1350 | |
| color | white | pure | pure | pure | pure | |
| Density (g/cm³) |
2.73 | 2.67 | ||||
| Fiber Diameter(µm) | 3.0-5.0 | |||||
| Shot Content (%) | ≤15 | ≤15 | ≤15 | ≤15 | ≤11 | |
| ∮≥0.212mm | ||||||
| Chemical Composition | AL2O3 | ≥44 | ≥45 | ≥45 | ≥53 | ≥36 |
| SiO2 | ≥52 | ≥52 | ≥54 | ≥46 | ≥48 | |
| ZrO2 (%) | - | - | - | ≤0.2 | ≥15 | |
| Fe2O3 | ≤1.0 | ≤0.8 | ≤0.2 | ≤0.1 | ≤0.1 | |
| Al2O3+SiO2 | ≥96 | ≥97 | ≥99 | ≥99 | - | |
| Al2O3+SiO2+ZrO2 | - | - | - | - | 99 | |
More details and custom size please contact our sales at sales@unitexcomposite.com.



