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Magnesium Oxide Board

Magnesium oxide board, often referred to as MgO board and magnesium wallboard, is a versatile, high-performance construction material used in various building applications. It is known for its strength, durability, and fire-resistant properties. Here are some key features and benefits of the MgO board:

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Features of Magnesium Oxide Board

  1. Composition: Made primarily from magnesium oxide (MgO), a type of mineral cement, combined with magnesium chloride and other materials such as perlite, glass fibers, and wood dust.

  2. Fire Resistance: MgO boards are highly fire-resistant, often achieving Class A fire ratings. When exposed to fire, they do not burn, emit smoke, or produce toxic fumes.

  3. Water Resistance: These boards are also resistant to water, making them suitable for use in moist or humid environments without swelling, warping, or degrading.

  4. Mold and Mildew Resistance: MgO's inorganic composition makes it resistant to mold, mildew, and other fungal growth.

  5. Strength and Durability: MgO boards are solid and durable, capable of withstanding physical impacts and stresses. They are highly resistant to cracking and chipping.

  6. Thermal Insulation: MgO boards provide good thermal insulation properties, improving building energy efficiency.

  7. Sound Insulation: The boards also offer soundproofing benefits, making them suitable for use in walls, ceilings, and floors in both residential and commercial buildings.

  8. Environmentally Friendly: MgO boards are often considered eco-friendly and made from natural and recyclable materials. They do not contain harmful chemicals like asbestos.

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Applications of Magnesium Oxide Board

Wall and Ceiling Panels: Used in interior and exterior walls and ceilings, MgO boards provide a smooth, firm surface that can be finished with paint, plaster, or other coatings.

Fireproof Barriers: Due to their fire resistance, MgO boards, including fire-rated walls and ceilings, are used as fireproof barriers in buildings.

Flooring: MgO boards offer a stable, moisture-resistant base as an underlayment or substrate for various flooring materials.

Roof Sheathing: MgO boards can be used in roofing systems, providing a durable, fire-resistant, and weather-resistant sheathing layer.

SIPs (Structural Insulated Panels): MgO boards are often used as the facing material for SIPs used in energy-efficient building construction.

Partitions: These are used to create partitions for offices, schools, hospitals, and other buildings, providing sound insulation and fire resistance.

Tile Backer: In bathrooms, kitchens, and other areas exposed to moisture, MgO boards serve as a reliable backer for tiles.

Advantages of Traditional Materials

Versatility: Can be used in various applications where traditional materials like drywall, cement board, or plywood might be used.

Installation: Typically easy to cut, drill, and install, making construction more efficient.

Health and Safety: Non-toxic and safe for indoor environments, unlike materials that may off-gas or release harmful substances.


Cost: MgO boards may be more expensive than traditional materials, though their durability and performance can offset the initial cost over time.

Weight: They can be heavier than some alternatives, impacting handling and installation logistics.

Magnesium oxide boards offer a combination of fire resistance, moisture resistance, strength, and eco-friendliness, making them valuable in modern construction practices.

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