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Magnesium Oxysulfate Board

  • Magnesium Oxysulfate Board
  • Magnesium Oxysulfate Board
  • Magnesium Oxysulfate Board
  • Magnesium Oxysulfate Board
  • Magnesium Oxysulfate Board
  • Magnesium Oxysulfate Board

Magnesium Oxysulfate Board
Magnesium Oxysulfate Board(also known as MOS Board,MgSO₄Board)is a type of magnesia cement material,made from active magnesium oxide(MgO)and magnesium sulfate(MgSO₄)solution,reinforced with alkali-resistant fiberglass mesh,and blended with lightweight fillers such as perlite and plant fibers.Unlike traditional magnesium oxychloride boards,MOS Board contains no chloride ions and is non-corrosive to steel.
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product description

Product Description

Magnesium Oxysulfate Board(also known as MOS Board,MgSO₄Board)is a type of magnesia cement material,made from active magnesium oxide(MgO)and magnesium sulfate(MgSO₄)solution,reinforced with alkali-resistant fiberglass mesh,and blended with lightweight fillers such as perlite and plant fibers.Unlike traditional magnesium oxychloride boards,MOS Board contains no chloride ions and is non-corrosive to steel.It completely eliminates the defects of moisture absorption,salt efflorescence,and metal corrosion commonly found in other magnesia-based building materials.The product complies with the Chinese national standard"Magnesia cement products–Magnesium sulphide plate"(T/CMMA 8-2020),making it an ideal upgrade replacement for traditional MGO boards,gypsum boards,and plywood.

Product Specifications

ItemSpecification
Standard Sizes1220×2440mm,1200×2400mm
Custom SizesLength 2400-3050mm,Width 900-1220mm
Thickness3mm,4mm,5mm,6mm,8mm,9mm,10mm,12mm,15mm,18mm,20mm
ColorsWhite,Grey,Blue,Green(customizable)
Apparent Density0.96-1.1 g/cm³
Fire RatingA1 Non-combustible(GB8624)
Fire Resistance≥1 hour(50mm thickness)
Bending StrengthDry state≥11MPa(Class A),Saturated state≥22MPa
Compressive Strength≥0.5MPa(density 150kg/m³)
Water Absorption≤0.8%(sandwich panel)
Thermal Conductivity0.035-0.055 W/(m·K)
Sound Insulation≥44dB
Advantages and Applications

Key Advantages

A1 Class Fireproof&Non-Combustible:Fire rating reaches A1 class,non-combustible.Withstands temperatures over 1200°C;50mm MOS board provides≥1 hour fire resistance.Emits no toxic smoke when exposed to fire.

Chloride-Free&Corrosion-Resistant:Unlike traditional magnesium oxychloride boards,MOS Board uses magnesium sulfate instead of magnesium chloride.Contains no chloride ions and is non-corrosive to steel.Safe for use in steel structures and metal frames without rust concerns.

Excellent Water&Moisture Resistance:Ultra-low water absorption as low as≤0.8%.No softening or deformation after long-term water immersion.Completely eliminates the moisture absorption and salt efflorescence issues of traditional magnesia boards.

Lightweight&High Strength:MOS board with density of 150kg/m³achieves compressive strength above 0.5MPa.Lightweight wall panels have density of only 400-450kg/m³—the lightest at equivalent strength,offering significant freight cost advantages.

Eco-Friendly&Green:100%asbestos-free,formaldehyde-free,and non-radioactive.Zero waste emissions during production;fully recyclable and reusable green building material.Passes E0 grade formaldehyde testing.

Easy to Process&Install:Can be nailed,sawed,drilled,bent,and laminated.No special tools required for cutting and installation,significantly reducing construction timelines.

Sound&Thermal Insulation:Low thermal conductivity of 0.035-0.055 W/(m·K);sound insulation up to 44dB+.Lightweight wall panels achieve 38-50dB sound insulation.

Dimensional Stability:Low shrinkage rate with minimal warping.Stable physical properties under both high and low temperature conditions.

Applications

MOS Board is widely used in building and decoration projects:

Interior Partition Walls:Lightweight wall systems for residential,hotels,offices

Ceiling Systems:Suspended ceilings for commercial spaces,schools,hospitals,airports

Cleanroom&Purification Projects:Wall and ceiling systems for cleanrooms,food processing plants,laboratories

Fire Door Cores:Core material for fire-rated doors

Exterior Wall Insulation:Building exterior insulation systems

Prefabricated Buildings:Modular building components and prefabricated elements

Flooring Substrates:High-strength floor covering materials

Decorative Panel Substrates:Base material for various decorative panels

Steel Truss Floor Panels:Replacement for thin steel sheets,bonded with steel trusses

Customized sizes and specifications are available according to customer requirements,project needs and destination market preferences.

Export Packaging and Consulting

Packing and Loading

MOS Board is packed with export standard pallet packing.Each pallet is wrapped with plastic film for moisture protection and fixed with steel or plastic straps.Good packing helps reduce damage during handling,loading and long-distance transportation.

Regular container loading options include 20GP and 40HQ.Loading quantity depends on thickness,size,density and packing method.

Send Your Inquiry

Share your MOS Board requirements with us,and our team will recommend suitable specifications according to your application,market and project needs.

For a more accurate quotation,you can include the following details in your inquiry:

Thickness:3mm,4mm,5mm,6mm,8mm,9mm,10mm,12mm,15mm,18mm,20mm or customized thickness

Size:1220×2440mm,1200×2400mm or customized size

Color:White,Grey,Blue,Green or customized color

Application:Interior partition,ceiling,cleanroom,fire door core,exterior insulation,prefabricated building or other use

Certification Requirements:CE,EN13501,ASTM,etc.

Order Quantity:Pieces,cubic meters,pallets or container quantity

Destination Market:Destination country or port for packing and loading reference

We will provide product details,packing suggestions and quotation support as soon as possible.

Product Applications
  • 低密度轻质硫氧化镁医院净化板_-_MOS_机制面板和净化夹芯板_cleanroomequipment.en.made-in-china.com_20260626022544_region
  • 用于室内装饰的HPLPVC复合氧化镁板_-_HPL复合氧化镁板和PVC复合氧化镁_weiranbuild.en.made-in-china.com_20260626031721_region
  • 28毫米耐磨货运集装箱胶合板地板_-_集装箱地板和集装箱胶合板地板_wfsuntop.en.made-in-china.com_20260626031921_region
  • 厂家直销价整屋集装箱实木复合橡木亮面木地板_-_地板砖和建筑材料_sdluhuan.en.made-in-china.com_20260626032102_region
  • 厂家直销价整屋集装箱实木复合橡木亮面木地板_-_地板砖和建筑材料_sdluhuan.en.made-in-china.com_20260626032126_region
  • 出口级大理石纹理地坪漆，自流平车间地坪漆，户外耐磨环氧彩色砂地坪漆_-_环氧彩色_qdenze2006.en.made-in-china.com_20260626062212_region
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  • 出口级大理石纹理地坪漆，自流平车间地坪漆，户外耐磨环氧彩色砂地坪漆_-_环氧彩色_qdenze2006.en.made-in-china.com_20260626062539_region
  • 环氧彩色砂面地坪漆，大理石纹理室内住宅防水防滑水泥地坪漆，自流平地坪漆_-_20_qdenze2006.en.made-in-china.com_20260626063146_region
FAQ
Q：

What types of paints/coatings do you offer,and which substrates are they suitable for?

A：
We provide comprehensive coating systems for various building boards,including water-based eco-coatings,fire-retardant coatings,and anticorrosion coatings.They can be customised according to different substrates(fibre cement,magnesium oxide,calcium silicate,etc.)and application environments(indoor,outdoor,humid conditions).
Q：

What are the features of Container Flooring HPL?

A：
HPL(High-Pressure Laminate)container flooring is made from multiple layers of kraft paper impregnated with thermosetting resin and combined with a decorative layer.It offers high abrasion resistance and high scratch resistance.Typical construction is plywood substrate with HPL overlay,thickness range 6-35mm,and sizes can be customised.
Q：

What is the fire rating and fire resistance limit of Magnesium Oxide Board?

A：
Magnesium Oxide Board achieves the highest non-combustible A1grade–it does not burn at 800°C,shows no flame at 1200°C,and has an ignition point as high as 2700°C.When used with quality steel framing,the partition system can achieve a fire resistance of over 3 hours.A 6mm board provides sound insulation of approximately 29dB.
Q：

What are the unique advantages of Fiber Reinforced Calcium Silicate Board?

A：
These boards are cured by steam or high-pressure steam to form a stable structure mainly composed of tobermorite crystals.They are lightweight,high-strength,fireproof,moisture-proof,heat-insulating,and have low deformation rates.Thicknesses of 5-12mm are suitable for interior partition walls and ceilings,while 18mm+boards are used for loft flooring and raised access floors for underfloor heating systems.
Q：

What specifications and densities are available for Fiber Cement Board?

A：
Standard sizes are 2000-2440mm in length and 1000-1220mm in width,with common thicknesses of 4-12mm(customisable from 2.5mm to 90mm in China).They are classified into high,medium,and low density–higher density and thicker boards provide better thermal and acoustic insulation.Products meet JC/T 412.1-2018 and JC/T 412.2-2018,with non-combustible A-grade,corrosion resistance,and electrical insulation properties.
Q：

What is the difference between Magnesium Oxysulfate Board and ordinary Magnesium Oxide Board?

A：
Magnesium Oxysulfate Board uses magnesium sulfate as the cementitious material,while traditional Magnesium Oxide Board(chloride-type)uses magnesium chloride.The biggest advantage of Magnesium Oxysulfate Board is that it does not absorb moisture or cause halogenation–chloride ions in chloride-type boards are hydrophilic and can attract moisture from the air under humid conditions,causing surface droplets and corrosion to metal.The sulfate type avoids these issues,offering excellent fire resistance,light weight,corrosion resistance,high dimensional stability,and low alkalinity.The industry standard for this product was finalised in 2021.
Q：

What is the substrate of Inorganic Pre-coated Board,and how ecofriendly is it?

A：
Inorganic Pre-coated Board is based on 100%asbestos-free calcium silicate board,which is then surface-treated and precision-coated.It contains no formaldehyde,no asbestos,and no radioactive elements,making it a green building material.In 2020,it was recognised as a Green Design Product by the Ministry of Industry and Information Technology(5th batch).
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