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SULFROCK

MAGNESIUM SULPHATE BOARD
BENEFITS & FEATURES

Magnesium sulphate boards offer high fire resistance, moisture stability and durability
– a dependable, sustainable choice for any construction project.

Magnesium sulphate boards offer high fire resistance, moisture stability and durability – a dependable, sustainable choice for any construction project.

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. MgO 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.

SULFROCK BOARD SIZES

Our high-quality, chlorine-free MSB are a top-tier choice for a wide range of applications, including wall and ceiling linings, subfloor systems, interior finishes, and exterior sheathing.

SULFROCK MSB panels are supplied in the standard 4ft × 8ft format, with thickness options from 5mm to 20mm, ensuring a tailored solution for projects of any scale.

Depth (mm) Width (mm) Length (mm) Density (kg/M3) Flexural Strength
5 1220 2440 / 2740 / 3050 1050 12 – 18
6 1220 2440 / 2740 / 3050 1050 12 – 18
8 1220 2440 / 2740 / 3050 1050 12 – 18
9 1220 2440 / 2740 / 3050 1050 12 – 18
10 1220 2440 / 2740 / 3050 1050 12 – 18
12 1220 2440 / 2740 / 3050 1050 12 – 18
15 1220 2440 / 2740 / 3050 1050 12 – 18
16 1220 2440 / 2740 / 3050 1050 12 – 18
18 1220 2440 / 2740 / 3050 1050 12 – 18
20 1220 2440 / 2740 / 3050 1050 12 – 18

FIRE-RESISTANT PERFORMANCE

SULROCK’s MSB boards provide a sustainable and non-combustible solution for all types of construction projects.

Offering exceptional fire resistance of up to 2–3 hours and capable of withstanding temperatures of 800 °C without igniting, our boards are rigorously tested to ASTM standards and carry an A1 fire rating.

Discuss your Project
Discuss your Project

SULFROCK V OTHER MATERIALS

Feature SULFROCK MgS Boards Solid Wood Board Composite Board Ceramic Sheet Magnesium Chloride Board (Cl2) Calcium Silicate Board
Environmentally Friendly High Average High Average Average High
Fireproof A1 B2 B1 A2 A2 A1
Waterproof High Poor Poor Poor Poor Average
Mould Resistent High Poor High High Poor High
Single Layer Subfloor ✓ ✓ ✓ ✓ ✓ ✓
Wear Resistant High Poor Poor High High Average
Weather Resistant High Poor Poor High Average High
Fastener Retention High High High Poor High Poor
Overview / Comments Highly Reliable Substrate Costly Poor Surface Finish Fragile & Costly Moisture Build-Up High Weight, Moisture Risk

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