Fireproof glass is a functional safety glazing material designed to contain fire spread and isolate smoke in the event of a fire. It is evaluated according to fire resistance performance, including integrity and where applicable, thermal insulation.

Through specialized processing techniques, fireproof glass is able to maintain structural integrity and for certain types, limit heat transfer during standardized fire resistance tests. Depending on application requirements, it can be manufactured using float glass, tempered glass or laminated composite structures.

Product Structure & Types

1. Composite Fireproof Glass

Composite fireproof glass consists of two or more layers of glass bonded with one or multiple layers of water-soluble inorganic fireproof interlayers.

Fire Protection Mechanism:

When exposed to high temperatures, the fire-facing glass layer cracks, triggering the interlayer to foam and expand significantly, forming a rigid, opaque fire-resistant barrier. This layer helps to block flames, reduce heat transfer, and limit the passage of smoke and gases.

Processing Capabilities:

• Edge polishing
• Drilling
• Cutting to size

Typical Applications:

• Fire-rated doors and windows
• Interior corridors and escape passages
• Fire-resistant partitions and walls
• Exterior windows and curtain walls (when combined with PVB laminated glass, as required by design)

 

2. Monolithic Fireproof Glass

Monolithic fireproof glass features a single-layer glass structure designed to maintain fire resistance integrity for a specified duration.

Performance Characteristics:

• Blocks open flames and smoke
• Does not provide thermal insulation
• High strength and transparency

Suitable Applications:

• Exterior curtain walls
• Outdoor windows and skylights
• Smoke barriers
• Frameless fireproof glass doors
• Partitions without thermal insulation requirements

 

3. Infusion (Gel-Filled) Fireproof Glass

Infusion fireproof glass is composed of two or three layers of glass, sealed around the edges with special flame-retardant strips. The cavity is filled with a transparent fire-resistant gel, which solidifies after curing.

Fire Protection Mechanism:

Under high temperatures, the gel layer rapidly hardens and becomes opaque, forming an insulating fire-resistant board. This structure helps to prevent flame spread and reduce heat transmission to the non-fire side.

Additional Features:

• Fire resistance with thermal insulation
• Good sound insulation performance
• Can be processed into curved or arched shapes

Typical Applications:

• Fire-rated doors and windows
• Atriums and patios
• Shared public spaces
• Fire-resistant partitions in control rooms or data rooms

Fireproof Glass Classification

Class A

Fireproof glass that meets both fire resistance integrity and thermal insulation requirements.

Includes composite and infusion-type fireproof glass.

Key Features:

• Transparency
• Fire and smoke isolation
• Thermal radiation reduction
• Sound insulation and impact resistance

Recommended Applications:

Steel or timber fire-rated doors and windows, partitions, skylights, smoke barriers, transparent floors and other building components requiring both visibility and fire protection.

 

Class B

Fireproof glass that meets fire resistance integrity and thermal radiation intensity requirements.

Typically composed of composite fireproof glass.

Key Features:

• Light transmission
• Fire and smoke isolation

 

Class C

Fireproof glass that meets fire resistance integrity only.

Key Features:

• Transparency
• Fire resistance and smoke isolation
• High mechanical strength

Recommended Applications:

Fireproof glass partitions, fire-rated windows, exterior curtain walls and other areas without thermal insulation requirements.