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Magnesium Oxide Boards (MgO Boards)
Magnesium Oxide Boards (MgO Boards)
Rock Wool Strip
Rock Wool Strip
Extruded polystyrene foam plastic sheet
Extruded polystyrene foam plastic sheet
Termite Resistance, prevent termite damage
Termite Resistance, prevent termite damage
Rock Wool Boards, the preferred fireproof material
Rock Wool Boards, the preferred fireproof material
Fiber Cement Board with strong comprehensive strength
Fiber Cement Board with strong comprehensive strength
Magnesium oxide sanded board(MgO Sanded Board)
Magnesium oxide sanded board(MgO Sanded Board)
Decorative Magnesium Oxide Board for Interior Walls
Decorative Magnesium Oxide Board for Interior Walls
Glass Wool, a highly cost-effective thermal insulation material
Glass Wool, a highly cost-effective thermal insulation material
Reinforced Structural Insulated Panel(RSIP), combining insulation with reinforcement capabilities
Reinforced Structural Insulated Panel(RSIP), combining insulation with reinforcement capabilities
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China MgO Boards Suppliers | High-Quality Magnesium Oxide Boards Factory for Fire-Resistant Construction

MgO board, or magnesium oxide board, is a premium building material predominantly composed of magnesium oxide, magnesium chloride, and reinforced with glass fiber and non-woven fabric. Known for its exceptional fire resistance, moisture resistance, and high strength-to-weight ratio, this versatile product is increasingly favored in the construction industry, As a leading China supplier and factory of MgO boards, we provide high-quality solutions for various applications, including interior and exterior wall decoration, ceilings, and partition projects. Choose our MgO board for reliable, durable, and efficient building solutions that meet your construction needs
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    Forest Calcium Silicate Board for wide building application (8)

    • Excellent fire resistance

      Non-combustible class A material

    • Superior water proofing ability

      Good moisture resisting ability, not easy to generate swelling or shaping.

    • High Strength

      The wall of Calcium Silicate board is very strong and durable, not easy to be damaged.

    • Wonderful sound and heat insulation performance

      Filled with mineral wool, not only heat insulation but also sound insulation

    • Stable Dimensions

      Both moisture movement and the shrinking percentage are controlled in a optimum range.

    Product Details

    📐 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)
    Fire Reaction A1 — Highest non-combustible classification
    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

    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

    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.

    Multi-Certified Magnesium Oxide Board (2)
    Decorative Magnesium Oxide Board for Interior Walls, easily create a beautiful interior wall (4)
    Magnesium Oxide Boards (MgO Boards) (2)
    Frequently Asked Questions (FAQ)
    Q What fire rating does Magnesium Oxide Board achieve?
    MgO Board achieves an A1 fire reaction classification — the highest non-combustible rating under EN 13501-1. It also meets ASTM E84 Class A (zero flame spread, SDI < 5) and BS 476 Parts 4, 6, 7, and 11, making it suitable for the most demanding fire-rated construction assemblies.
    Q Is Magnesium Oxide Board safe for indoor use — does it emit VOCs or formaldehyde?
    Yes, MgO Board is completely safe for indoor environments. It emits zero VOCs (tested per ISO 16000 and AgBB) and is formaldehyde-free (below detection limits per EN 717-1, JIS A 1460, and ASTM E1333). It is also free of asbestos and heavy metals, making it GREENGUARD Gold eligible and LEED contributable.
    Q What thicknesses and sizes are available for MgO Board?
    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 available upon request to meet specific project requirements.
    Q How does MgO Board perform in wet or humid environments?
    MgO Board offers excellent moisture resistance. Water absorption is less than 10% by weight after 24 hours of immersion (EN 12467). Its inorganic mineral core inherently resists mold and mildew growth (ASTM G21, ASTM D3273), and it maintains structural integrity through multiple freeze-thaw cycles (ASTM C666), making it ideal for bathrooms, wet areas, and exterior applications.
    Q Can MgO Board be cut and installed using standard tools?
    Yes. MgO Board can be easily cut, routed, drilled, and shaped using standard woodworking tools. Compared to traditional cement boards, it generates significantly less silica dust during cutting. The "PureGuard Treated" smooth factory finish also provides excellent adhesion for tiles, renders, plasters, paints, and veneers without additional surface preparation.
    Q What mechanical strength standards does MgO Board meet?
    MgO Board demonstrates strong mechanical performance: flexural strength ≥ 15 MPa and modulus of elasticity ≥ 4500 MPa (both per EN 12467), nail pull resistance ≥ 75 lbf / 340 N (ASTM C473), and thermal shock resistance exceeding 1000°C without spalling or cracking. It also meets or exceeds relevant building standards for screw holding capacity and impact resistance.

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