Borosilicate Glass Sheet is made from premium borosilicate 3.3 glass with excellent heat resistance, thermal shock resistance and high optical clarity. We provide custom sizes, thicknesses, shapes and precision processing services for industrial sight glass, laboratory equipment and high-temperature applications.
Borosilicate Glass Sheet is manufactured from premium borosilicate 3.3 glass, offering exceptional thermal stability, low thermal expansion and excellent optical clarity. Compared with ordinary glass, it withstands rapid temperature changes while maintaining dimensional stability and high mechanical strength, making it an ideal material for demanding industrial environments.
Designed for applications requiring reliable performance under high temperatures and corrosive conditions, our borosilicate glass sheets provide excellent resistance to thermal shock, acids, alkalis and most chemicals. They are widely used as sight glass, furnace viewing windows, laboratory equipment, lighting components, semiconductor equipment and various industrial inspection systems.
As a professional Borosilicate Glass Sheet manufacturer, we provide custom fabrication services including precision cutting, CNC edge grinding, drilling, tempering, coating and silk-screen printing. Thickness, dimensions, shapes and surface finishes can all be customized according to customer drawings or technical requirements.
Whether you need standard borosilicate glass plates or fully customized high-temperature glass solutions, we deliver consistent quality, strict dimensional accuracy and reliable global supply for OEM and industrial projects.
Excellent Thermal Shock Resistance
The low thermal expansion coefficient of borosilicate 3.3 glass enables it to withstand rapid temperature changes without cracking, making it suitable for repeated heating and cooling cycles.
High Temperature Resistance
Borosilicate Glass Sheet can operate continuously at temperatures up to approximately 450°C and withstand higher short-term temperatures, ensuring reliable performance in high-temperature industrial equipment.
Excellent Chemical Resistance
The dense glass structure provides outstanding resistance to acids, alkalis and most chemicals, making it suitable for laboratory and chemical processing applications.
High Optical Clarity
With light transmission up to 92%, the glass provides clear visibility for observation windows, inspection equipment and optical applications.
Precision Processing Capability
The material supports precision machining including cutting, drilling, edging, polishing and tempering while maintaining excellent dimensional accuracy.
| Property | Specification |
| Material | Borosilicate 3.3 Glass |
| Thickness | 1.2–20 mm (Custom Available) |
| Density | 2.23 ±0.02 g/cm³ |
| Light Transmission | Up to 92% |
| Thermal Expansion | 3.3 × 10⁻⁶/K |
| Working Temperature | ≤450°C |
| Short-Term Temperature | ≤550°C |
| Softening Point | 820 ±10°C |
| Thermal Conductivity | 1.2 W/(m·K) |
| Hardness | >7 Mohs |
| Thermal Shock Resistance | ≥125 K |
| Surface Processing | Tempering, Coating, Drilling, Polishing, Printing |
Our Borosilicate Glass Sheets are widely used in industries requiring high thermal stability, optical transparency and chemical resistance.
Typical applications include:
· Industrial sight glass
· Furnace observation windows
· Laboratory instruments
· Chemical processing equipment
· Semiconductor manufacturing equipment
· Medical and analytical instruments
· High-temperature lighting fixtures
· Optical inspection equipment
· Food processing machinery
· Vacuum systems
We provide comprehensive OEM and custom fabrication services to meet different industrial requirements. Every Borosilicate Glass Sheet is manufactured using precision processing equipment to ensure consistent quality and dimensional accuracy.
Available customization options include:
· Custom thickness from 1.2 mm to 20 mm
· Round, square or irregular shapes
· Precision CNC cutting
· Edge grinding and polishing
· Hole drilling and slot machining
· Tempered borosilicate glass
· Anti-reflective or functional coatings
· Silk-screen printing
· Logo marking
· Custom packaging
Every Borosilicate Glass Sheet undergoes strict quality inspection before shipment to ensure stable performance and reliable quality.
Quality control includes:
· Raw material inspection
· Dimensional accuracy inspection
· Surface quality inspection
· Flatness inspection
· Optical transmission testing
· Edge quality inspection
· Packaging inspection before shipment
Our manufacturing process follows international quality management standards to provide consistent products for industrial and OEM applications.
Packaging
To ensure safe transportation, each Borosilicate Glass Sheet is carefully packed using multi-layer protective materials.
· Protective PE film or paper between each sheet
· EPE foam protection
· Reinforced export wooden crates
· Suitable for sea, air and land transportation
 |  |  |
Shipping
· Sample orders available
· Global express shipping via DHL, FedEx, UPS or TNT
· Sea freight for bulk orders
· FOB, CIF, EXW and other trade terms available upon request
| Item | Details |
| MOQ | Small sample orders accepted |
| Sample Lead Time | 3–7 working days |
| Mass Production | 10–20 working days |
| OEM Service | Supported |
| Custom Design | Supported |
| Export Markets | Worldwide |
Q1. What is the maximum working temperature of Borosilicate Glass Sheet?
The glass can operate continuously at temperatures up to approximately 450°C and withstand short-term exposure to temperatures of 550°C, depending on the application conditions.
Q2. Can you manufacture custom sizes and shapes?
Yes. We provide custom dimensions, thicknesses, diameters, shapes, hole drilling, edge processing and other machining services based on customer drawings.
Q3. Do you offer tempered borosilicate glass?
Yes. Tempered Borosilicate Glass Sheet is available for applications requiring higher mechanical strength and improved safety performance.
Q4. Which industries use Borosilicate Glass Sheet?
It is widely used in laboratory equipment, industrial machinery, chemical processing, lighting, semiconductor manufacturing, medical devices and sight glass applications.
Q5. How do you ensure product quality?
Each product undergoes comprehensive inspections covering raw materials, dimensions, surface quality, optical performance and packaging before shipment to ensure reliable quality and consistent performance.