As a fire-resistant exterior wall cladding, magnesium oxide board (MgO board) exhibits outstanding performance in fire protection, durability, and adaptability for building facades due to its unique inorganic material properties and structural characteristics. It is particularly suitable for meeting the high fire safety requirements of building exteriors. Its core features are as follows:

 

1. Core Fire Resistance: The First Line of Defense Against Fire Spread

Class A1 Non-combustible Base Material, Preventing Fire at the Source
Compliant with the highest fire resistance rating in GB 8624-2024, it does not burn or melt/drip when exposed to fire. Unlike organic claddings (e.g., PVC boards, composite wood panels) that act as fire spreaders, MgO board maintains structural integrity even when the exterior wall is affected by external fires (e.g., adjacent building fires) or internal flame ,delaying the penetration of fire into the building interior.

 

Exceptional High-Temperature Stability, Withstanding Extreme Fire Conditions
It remains non-combustible at 800°C and prevents open flame spread at 1200°C. Leveraging the high melting point of magnesium oxide (theoretical temperature resistance up to 2800°C), it can resist short-term intense flame exposure. Compared to traditional exterior claddings-such as stone, which is prone to cracking under high temperatures, or metal panels, which soften and deform when heated-MgO board retains its shape during fires, reducing the risk of debris falling.

 

Smoke-Free and Non-Toxic, Mitigating Secondary Hazards
It releases no toxic gases (e.g., formaldehyde, carbon monoxide) at high temperatures, with smoke toxicity reaching AQ1 level (safety class 1). During exterior wall fires, it prevents thick smoke or toxic gases from seeping into the interior through door/window gaps, safeguarding evacuation routes and buying time for occupant escape.

 

2. Structural and Environmental Adaptability: Resisting Complex Outdoor Conditions

Wind Pressure and Impact Resistance, Ensuring Facade Stability
With a moderate density (1.0-1.2g/cm³) and flexural strength exceeding 10MPa, MgO board forms an exterior wall system with keels and insulation layers that can withstand climatic impacts such as strong winds and heavy rains. Even in cases of external impacts (e.g., falling objects, construction collisions), it is unlikely to suffer large-scale damage, reducing the risk of cladding detachment.

 

Water and Moisture Resistance, Combating Outdoor Humidity
Moisture-resistant MgO boards (treated with water repellents or special curing agents) have a water absorption rate controlled within 8%. When exposed long-term to rain, snow, or high humidity (e.g., southern China's plum rain season, coastal areas), they resist moisture regain, mildew, or deformation. Unlike wooden claddings that rot or ordinary gypsum boards that soften, they maintain exterior wall flatness over time.

 

Excellent Weather Resistance, Resisting UV Rays and Corrosion
Inorganic components (magnesium oxide, magnesium chloride, etc.) are less susceptible to UV-induced aging, avoiding fading or chalking like organic coatings, or rusting like metal claddings. In corrosive environments such as industrial zones (with dust, acid/alkali mist) and coastal areas (with salt), they retain stable surface performance, extending the exterior wall renovation cycle.

 

3. Functional Synergy: Adapting to Exterior Wall System Integration Needs

Compatibility with Insulation Layers, Balancing Fire Safety and Energy Efficiency
It can be combined with insulation materials such as rock wool and phenolic foam to form a composite exterior wall structure of "fire-resistant cladding + insulation layer." The non-combustible property of MgO board compensates for the fire risks of certain insulation materials (e.g., flammable EPS boards), while its smooth surface acts as a protective layer for insulation, preventing erosion by wind and rain.

 

Easy Construction, Adapting to Various Exterior Wall Techniques
Lighter than stone or ceramic tiles, it can be quickly installed via nailing or gluing, reducing loads on the building's main structure. Its surface can be directly finished with fluorocarbon paint, stone-like paint, or composite stone/wood textures, balancing fire performance with architectural aesthetics and meeting the diverse style needs of modern buildings.

 

Dimensional Stability, Reducing Exterior Wall Cracking Risks
With a low thermal expansion coefficient (≤0.08mm/m・℃), it is minimally affected by day-night temperature differences or seasonal changes, and exhibits good deformation compatibility with exterior wall substrates (e.g., concrete, blocks). Unlike ceramic tiles that fall off due to thermal expansion or coatings that crack due to substrate shrinkage, MgO board cladding maintains facade integrity long-term.

 

4. Typical Application Scenarios

Buildings with High Fire Requirements: Exterior walls of hospitals, schools, nursing homes, and other densely populated places, meeting the fire safety requirements for firewalls and evacuation stairwell exteriors in the Code for Fire Protection Design of Buildings.

 

Special Risk Areas: Buildings near chemical parks or gas stations (requiring explosion and fire resistance), and historic building renovations (needing fire safety upgrades while preserving original appearances).

 

Buildings in Harsh Environments: High-rise buildings in coastal areas (resisting salt spray corrosion), factories in humid regions (moisture and mildew resistance), and buildings in high-temperature areas (resisting heat-induced aging).

 

 

About Fireproof external wall cladding:

Product Parameters:

Main Materials	MgO, MgCl2/MgSO4, Glass fiber Mesh
Fire Performance	Non-combustible, No flame spread, No smoke spread,No poisonous gas
Density	1.0-1.25kg/m3,
Flexural Strength	8-25Mpa
Impact Strength	≥3.5 kJ/m2
Moisture Content	≤8%
Shrinkage	≤0.3%
Swelling	≤0.3%
ScrewHolding Capacity	40-120/(N/mm)
Leachable Chloride	0.1%(MOS),3%(MOC)
Edge	Square/T&G/Tapered/Beveled
Thickness	12-16mm
Standard Sizes	4*8ft/1.22*2.44m(Other sizes can be customized)
Production Capacity	5000 square meters / day
Remark	The above parameters are acceptable to ODM

 

 

Product Advantages

Excellent Fire Resistance

Fireproof External Wall Cladding utilizes advanced flame-retardant materials, specially processed to effectively resist high temperatures and flames. With a fire rating of Class A, it maintains structural integrity for extended periods under extreme fire conditions, effectively halting fire spread and providing crucial time for escape and rescue. Compared to ordinary exterior wall materials, Fireproof External Wall Cladding excels in fire resistance, with a fire endurance typically exceeding 2 hours.

 

Outstanding Durability and Stability

Fireproof External Wall Cladding employs high-strength, corrosion-resistant substrates combined with advanced production techniques, ensuring long-term stability in harsh environments. Its excellent weather resistance withstands UV rays, wind and rain erosion, and extreme temperature fluctuations, maintaining vibrant appearance and structural integrity. The lifespan of this cladding can reach over 30 years, far surpassing the average lifespan of ordinary exterior wall materials.

 

Superior Waterproof and Moisture-Proof Performance

Fireproof External Wall Cladding features a unique waterproof layer design, effectively isolating moisture infiltration and keeping interiors dry and comfortable. With an extremely low water absorption rate,  it significantly outperforms ordinary exterior wall materials in this regard. This characteristic makes Fireproof External Wall Cladding particularly suitable for rainy and humid regions, effectively preventing wall damage and indoor moisture issues caused by water infiltration.

 

Efficient Thermal Insulation

Fireproof External Wall Cladding also boasts efficient thermal insulation, with a unique thermal design effectively blocking heat transfer from the outside, maintaining stable indoor temperatures. In summer, it reduces solar radiant heat entering indoors, lowering air conditioning energy consumption; in winter, it minimizes indoor heat loss, enhancing heating efficiency. Buildings using Fireproof External Wall Cladding can reduce energy consumption by over 20% compared to traditional exterior wall materials.

 

Easy Installation

The installation process of Fireproof External Wall Cladding is simple and quick, typically using dry-hanging or adhesive methods, requiring no complex construction steps. This feature significantly shortens the installation cycle and reduces construction costs.

 

 

About The Factory：

 

 

Company Advantage (Why choose us)：

We specialize in quality control and consistency of MgO products. We have actively participated in the development of ASTM standards related to MgO products. We have joined hands with the China Magnesium Industry Association (CMMA), the Magnesium Oxide Building Products Association (MgOBPA) of North America, and the Magnesium Oxide Association (MOCA) to jointly promote the popularization of magnesium oxide cement products in the construction sector.

 

Packing and Shipping:

Packaging and Shipping of Fireproof External Wall Cladding

 

FAQ:

Q: How do I store the panels?

A: The boards should be stored flat on a well-supported surface off the ground in a cool, dry environment and remain in the manufacturer's packaging until ready for use. If stored outdoors or on site, cover with a waterproof material to protect from weather, direct sunlight, surface contamination and construction traffic.

 

Q:How do I cut the panels?

A: MgO boards work best with carbide tools, resulting in clean square cuts for higher quality installations. Circular saws, including table saws, work best. Thin sheets can be scored and snapped using disposable knives that can cut through the fibreglass mesh from the smooth side.

 

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