Fire Rated Borosilicate Glass is a high-performance tempered fire resistant glass featuring low thermal expansion, excellent heat shock resistance, and up to 3-hour fire protection. Available in customized sizes and thicknesses for fire doors, windows, curtain walls, and high-temperature applications.
Fire Rated Borosilicate Glass is a high-performance fire-resistant glass manufactured from premium borosilicate material with excellent thermal stability, low thermal expansion, and outstanding heat shock resistance. Designed for demanding fire protection applications, this tempered borosilicate glass provides reliable performance under extreme temperature conditions with a fire resistance rating of up to 3 hours.
Featuring a high softening point of 840℃ and excellent optical clarity with up to 92% visible light transmittance, this fire rated glass maintains structural stability and transparency during fire exposure. It is widely used for fire doors, fire windows, curtain walls, fire partitions, and other architectural applications requiring both safety and visibility.
Excellent Fire Resistance Performance
The Fire Rated Borosilicate Glass offers reliable fire protection with a fire resistance rating from 0.5 to 3 hours, helping improve building safety and prevent fire spreading.
Low Thermal Expansion Coefficient
With a thermal expansion coefficient of only 4.0×10⁻⁶ K⁻¹, this borosilicate fire resistant glass provides excellent dimensional stability and reduces the risk of cracking caused by rapid temperature changes.
Superior Thermal Shock Resistance
After tempering treatment, the glass can withstand thermal shock temperatures up to 300℃, making it suitable for high-temperature environments.
High Temperature Stability
With a softening point of 840℃ and long-term service capability at 500℃ without deformation, the glass maintains reliable performance under continuous heat exposure.
Excellent Optical Properties
Ultra-clear borosilicate glass provides high transparency with visible light transmittance up to 92%, ensuring clear visibility in architectural applications.
For applications requiring advanced optical performance and UV transmission properties, UV transmitting quartz glass can also provide specialized solutions.
Lightweight and High Strength
Compared with conventional fire-resistant glass products, this tempered borosilicate glass combines lightweight structure with excellent mechanical strength.
| Item | Parameter |
| Product Name | Fire Rated Borosilicate Glass |
| Material | Borosilicate Glass 3.3 |
| Thickness | 5mm, 6mm, 8mm, 10mm, 12mm |
| Maximum Size | 4800×2440mm |
| Color | Ultra Clear |
| Fire Resistance Rating | 0.5-3 Hours |
| Thermal Expansion Coefficient | α(20℃-300℃): 4.0×10⁻⁶ K⁻¹ |
| Heat Shock Temperature | 300℃ (After Tempered) |
| Softening Point | 840℃ |
| Annealing Point | 580℃ |
| Strain Point | 530℃ |
| Long-term Service Temperature | No deformation at 500℃ for 10 hours |
| Visible Light Transmittance | 92% |
| Density | 2.3 g/cm³ |
| Refractive Index | 1.47 |
| Young’s Modulus | 64 kN/mm² |
| Poisson’s Ratio | 0.2 |
| Knoop Hardness | HK 560 |
| Bending Strength | 130 MPa (After Tempered) |
Fire Rated Borosilicate Glass is widely applied in architectural and industrial environments requiring reliable fire protection and high-temperature resistance.
Building Fire Protection
· Fire doors and fire windows
· Fire rated curtain walls
· Fire resistant partitions
· Building safety glazing systems
Architectural Lighting
· Fire-resistant daylighting roofs
· High-temperature transparent structures
Transportation Industry
· Railway windows and protective glazing applications
Industrial Applications
· High-temperature observation windows
· Special equipment protection panels
We provide professional processing services for Fire Rated Borosilicate Glass according to customer project requirements.
Customization Options:
· Customized thickness from 5mm to 12mm
· Custom sizes up to 4800×2440mm
· Precision cutting
· Edge polishing
· Shape customization
· Tempering processing
· Customized surface treatment
Our experienced production team ensures stable quality control throughout material selection, processing, inspection, and packaging.
All Fire Rated Borosilicate Glass products are manufactured under strict quality control procedures to ensure reliable performance and long service life.
We conduct inspections on:
· Dimensional accuracy
· Optical quality
· Thermal performance
· Mechanical strength
· Surface quality
Our products comply with international quality management requirements and can be supplied with certifications including ISO9001, CE, SGS, and RoHS according to customer requirements.
1. What makes borosilicate glass suitable for fire rated applications?
Borosilicate glass has a low thermal expansion coefficient and excellent thermal shock resistance, allowing it to withstand rapid temperature changes during fire exposure.
2. What is the maximum fire resistance rating of this glass?
This Fire Rated Borosilicate Glass can achieve a fire resistance rating of up to 3 hours depending on application requirements and testing conditions.
3. Can you provide customized sizes and thicknesses?
Yes. We support customized thicknesses, sizes, shapes, and processing services according to customer drawings and project requirements.
4. Is tempered borosilicate glass suitable for high-temperature environments?
Yes. After tempering, the glass provides improved strength and can operate continuously at high temperatures without deformation.