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SULFROCK SOLUTIONS

MGB BOARD SHEAFING

Enhance your wall systems with high-performance, non-combustible magnesium oxide (MgO) boards

Our comprehensive range of MgS sheathing products suits a wide variety of applications – from new builds and modular structures to commercial spaces, residential developments, and refurbishments. Designed for fire resistance and fast installation, these boards provide a cost-effective alternative to traditional materials.

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  • Description
    High impact resistance with reliable structural support
  • Applications
    Exterior and interior wall sheathing
  • Replaces
    Gypsum, fibre board, OSB, plywood, engineered wood sheathing, and other structural wall panel systems.

Key Advantages

  • Enhanced Safety:
    Non-combustible and free from flammable materials.

  • Ease of Use:
    Simple, efficient installation.

  • Long-Lasting Durability:
    Strong, stable, and low-maintenance.

  • Versatile Application:
    Suitable for a wide range of sheathing requirements.

Technical Specifications

  • Thickness:
    6–15 mm

  • Standard Sizes:
    1220 × 2440 mm, 1220 × 2740 mm, 1220 × 3048 mm

  • Surface:
    Standard or sanded

  • Fire Rating:
    A1

  • Moisture Movement:
    0.1 – 0.12 %

  • Density:
    1000 – 1100 kg/m³

  • Flexural Strength:
    10 – 16 MPa

BENEFITS OF MAGNESIUM SULPHATE SHEATHING

Our MgO sheathing boards are engineered for outstanding protection and performance in external wall systems. Manufactured from high-quality magnesium oxide, they deliver exceptional fire, moisture, and weather resistance – ensuring long-term strength and stability for residential, commercial, and industrial applications.

FIREPROOF

A sustainable, non-flammable alternative for both residential and commercial projects. MgS boards resist fire for up to 2–3 hours, remaining stable at 800 °C and non-igniting until 1200 °C.

WATER-RESISTANT

Sulfrock boards retain structural integrity when exposed to moisture, preventing warping, swelling, and delamination.

NON-TOXIC

Free from fly ash, formaldehyde, crystalline silica, and other toxins – providing a safer, cleaner construction environment.

TERMITE-PROOF

Naturally resistant to moisture, fire, mould, and pests; ensuring lasting protection against warping, swelling, or decay.

ENVIRONMENTALLY FRIENDLY

Manufactured from natural compounds, our boards are recyclable and landfill-safe, classified as ‘nutritional waste’. Tested through 36 months of freeze / thaw cycles, they perform reliably all year round.

FUNGUS-RESISTANT

Antimicrobial properties protect against mould, mildew, and rot. Chloride-free formulation prevents corrosion and material expansion.

FIREPROOF

A sustainable, non-flammable alternative for both residential and commercial projects. MgS boards resist fire for up to 2–3 hours, remaining stable at 800 °C and non-igniting until 1200 °C.

WATER-RESISTANT

Sulfrock boards retain structural integrity when exposed to moisture, preventing warping, swelling, and delamination.

NON-TOXIC

Free from fly ash, formaldehyde, crystalline silica, and other toxins – providing a safer, cleaner construction environment.

TERMITE-PROOF

Naturally resistant to moisture, fire, mould, and pests; ensuring lasting protection against warping, swelling, or decay.

ENVIRONMENTALLY FRIENDLY

Manufactured from natural compounds, our boards are recyclable and landfill-safe, classified as ‘nutritional waste’. Tested through 36 months of freeze / thaw cycles, they perform reliably all year round.

FUNGUS-RESISTANT

Antimicrobial properties protect against mould, mildew, and rot. Chloride-free formulation prevents corrosion and material expansion.

WALL SHEATHING COMPARISONS

Items SULFROCK Wall Sheathing Chloride-Based MgO Panel OSB with Integrated Weather Barrier Fiberglass-Mat Faced Gypsum Chemically Coated OSB Sheathing OSB
Formulation MgOS4 MgO(Cl2) Wood Fiber Glass & Gypsum Wood & Proprietary Coating Wood
Structural Wall Sheathing ✓ ✓ ✓ ✗ ✓ ✓
Non-Combustible ✓ ✗ ✗ ✓ ✗ ✗
Silica Free ✓ ✗ ✓ ✗ ✓ ✓
Corrosion Resistant ✓ TBC ✓ ✓ ✓ ✓
Chemical Free ✓ ✓ ✗ ✗ ✗ ✗
Mold Resistant ✓ ✓ ✗ ✗ ✗ ✗
Mildew Resistant ✓ ✓ ✗ ✗ ✗ ✗
Screw / Nail Fixing ✓ ✓ ✓ ✓ ✓ ✓

APPLICATIONS

  • Residential Buildings:
    Provides a durable, fire-resistant base for cladding, render, or brickwork.

  • Commercial Properties:
    Delivers weather protection and structural stability for offices, hotels, and retail spaces.

  • Industrial Facilities:
    Offers fireproof and weather-resistant solutions for factories, warehouses, and workshops.

  • High-Rise Buildings:
    Complies with stringent fire safety and structural standards for tall developments.

CUSTOM SOLUTIONS

Every project is unique, and we’re here to tailor to yours.
Our customised MgO sheathing options include:

  • Bespoke sizes, thicknesses, densities, and flexural strengths.

  • Special surface treatments for enhanced weather resistance.

  • Engineered wind-load capacities for high-rise and coastal environments.

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