Environmental Building Board
Fire-proof Board
Sound Resistance
Termite Resistance
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China Magnesium Oxide Boards (MgO Boards) - High Strength, Fire & Moisture Resistant | Suppliers & Factory
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Excellent fire resistance
Non-combustible class A material
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Superior water proofing ability
Good moisture resisting ability, not easy to generate swelling or shaping.
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High Strength
The wall of Calcium Silicate board is very strong and durable, not easy to be damaged.
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Wonderful sound and heat insulation performance
Filled with mineral wool, not only heat insulation but also sound insulation
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Stable Dimensions
Both moisture movement and the shrinking percentage are controlled in a optimum range.
1 Core Parameters
| Density | 950 – 1150 kg/m³ (59 – 72 lb/ft³) — Optimized for strength-to-weight ratio |
| Thickness | 6mm, 8mm, 9mm, 12mm, 15mm, 18mm, 20mm (Custom thickness available) |
| Size | 1220mm × 2440mm (4' × 8'), 1200mm × 2400mm (Custom sizes possible) |
| Color | Natural off-white / light gray |
2 Fire Performance (A1 Grade)
A1 Fire Rated
Zero Flame Spread
Zero Toxicity
| Fire Reaction | A1 |
| Flame Spread | Zero flame spread (ASTM E84 / UL 723: Class A) |
| Smoke Developed Index (SDI) | < 5 (ASTM E84 / UL 723) |
| Heat Release | Total Heat Release (THR) and Peak Heat Release Rate (PHRR) |
| Toxicity | Zero |
3 Mechanical Strength & Durability
| Flexural Strength | ≥ 15 MPa (EN 12467) |
| Modulus of Elasticity | ≥ 4500 MPa (EN 12467) |
| Impact Resistance | High resistance to impact damage |
| Screw Holding Capacity | Meets or exceeds relevant building standards |
| Nail Pull Resistance | ≥ 75 lbf (340 N) (ASTM C473) |
| Thermal Shock Resistance | Exceeding 1000°C without spalling or cracking |
4 Moisture & Environmental Resistance
| Water Resistance | < 10% by weight after 24h immersion (EN 12467) |
| Moisture Vapor Transmission | Allows walls to "breathe" |
| Freeze-Thaw Resistance | Excellent performance after multiple cycles (ASTM C666) |
| Mold & Mildew Resistance | Inherently inorganic core inhibits growth (ASTM G21, ASTM D3273) |
5 Thermal & Acoustic Properties
Thermal Conductivity (λ): ~0.15 – 0.20 W/(m·K) — Provides basic insulation.
Acoustic Performance: Contributes to sound reduction in wall/ceiling assemblies (STC ratings vary by system design).
6 Environmental & Health
Zero VOC
Formaldehyde-Free
Asbestos-Free
Recyclable
VOCs: Zero VOC emissions (tested per ISO 16000, AgBB).
Formaldehyde: Free (< Detection Limit — EN 717-1, JIS A 1460, ASTM E1333).
Asbestos & Heavy Metals: Free (tested per relevant international regulations).
Recyclability: Inherently recyclable mineral content.
Sustainable Sourcing: Primary raw materials from abundant natural minerals.
7 Surface & Workability
Surface Finish: Smooth, low-dust factory finish ("PureGuard Treated" for improved adhesion).
Machinability: Easily cut, routed, drilled, and shaped with standard woodworking tools (minimizes silica dust vs. cement boards).
Adhesion: Excellent substrate for direct application of tiles, renders, plasters, paints, and veneers.
8 Certifications & Compliance
ISO 9001
GREENGUARD Gold
LEED Contributable
Fire: EN 13501-1: A1, ASTM E84 Class A, BS 476 Parts 4, 6, 7, 11, UL Certification (system dependent).
Structural: EN 12467, ASTM C1288 / C1325.
Environment / Health: LEED contributable, GREENGUARD Gold (or equivalent), EPDs (Environmental Product Declarations).
Quality: ISO 9001.
Frequently Asked Questions
What fire rating does the Magnesium Oxide Board achieve?
The MgO board achieves an A1 fire reaction classification under EN 13501-1, which is the highest possible non-combustible rating. It also meets ASTM E84 / UL 723 Class A with zero flame spread and a Smoke Developed Index (SDI) of less than 5, as well as BS 476 Parts 4, 6, 7, and 11.
What standard thicknesses and sizes are available for MgO boards?
Standard thicknesses include 6mm, 8mm, 9mm, 12mm, 15mm, 18mm, and 20mm. Standard sheet sizes are 1220mm × 2440mm (4' × 8') and 1200mm × 2400mm. Custom thicknesses and sizes are also available upon request.
Is the Magnesium Oxide Board safe for indoor air quality?
Yes. The board emits zero VOCs (tested per ISO 16000 and AgBB) and is completely free of formaldehyde (below detection limits per EN 717-1, JIS A 1460, and ASTM E1333). It contains no asbestos or heavy metals, making it a safe choice for residential and commercial interior applications.
How does MgO board perform in wet or high-humidity environments?
MgO board demonstrates excellent moisture resistance, absorbing less than 10% of its weight after 24 hours of immersion (EN 12467). Its inorganic core inherently inhibits mold and mildew growth (ASTM G21, ASTM D3273), and it performs well through multiple freeze-thaw cycles (ASTM C666), making it suitable for bathrooms, kitchens, and exterior applications.
Can MgO board be cut and installed using standard tools?
Yes. MgO board is easily cut, routed, drilled, and shaped using standard woodworking tools. Compared to traditional cement boards, it generates significantly less silica dust during cutting. Its "PureGuard Treated" surface provides excellent adhesion for tiles, renders, plasters, paints, and veneers.
Does MgO board support green building certifications such as LEED?
Yes. MgO board can contribute to LEED certification points due to its zero VOC emissions, formaldehyde-free composition, and recyclable mineral content. It is also eligible for GREENGUARD Gold certification (or equivalent) and comes with Environmental Product Declarations (EPDs), supporting sustainable building projects worldwide.