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Magnesium Oxysulfide Sandwich Panel

Name: Magnesium Oxysulfide Sandwich Panel
Brand: DXH Container House

Class A1 Fire-Rated | Chloride-Free | High-Performance Building Panels

Magnesium Oxysulfide (MOS) Sandwich Panels are a chloride-free prefabricated building material engineered for high-demand environments. Each panel features a dense MOS core — a blend of magnesium oxide, magnesium sulfate, modifiers, glass fiber mesh, and performance fillers — bonded between two color-coated steel or galvanized steel facing sheets.

Unlike older magnesium oxychloride (MOC) panels, MOS sandwich panels address the industry's concerns about corrosion and moisture "sweating." So that delivers superior long-term performance across a wide range of construction applications.

Magnesium oxysulfide sandwich panels combine load capacity, moisture resistance, Class A1 fire resistance, thermal insulation, and acoustic performance in a lightweight system. Making them one of the most versatile prefabricated panels available today.

Brand:

DXH Container

Place of Origin:

China

Payments:

L/C, D/A, D/P, T/T, Western Union, MoneyGram, OA

Lead Time:

1-500(sets): 30(days), >500(sets): To be negotiated(days) Customization: Customized

Customization:

Customized

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Technical Specifications

Specification	Value / Range
Panel Width	950 mm, 1150 mm
Panel Thickness	50 mm, 75 mm, 100 mm, 125 mm, 150 mm, 200 mm
Steel Sheet Thickness	0.4 mm – 0.8 mm (color-coated or stainless steel)
Core Density	Ranges from 220 – 280 kg/m³
Thermal Conductivity	≈ 0.055 W/(m·K)
Fire Rating	Class A1
Water Absorption Rate	≤ 0.8%
Chloride Content	Zero (chloride-free formulation)
Panel Profile / Shape	Tongue-and-groove; flat plate; corrugated / pressed type
Facing Material	Color-coated steel or galvanized steel with multi-layer corrosion-resistant coating

Where Are Magnesium Oxysulfide Sandwich Panels Used?

Magnesium Oxysulfide Sandwich Panels are specified in environments that demand certified fire resistance, controlled temperatures, and strict hygiene standards, including:

• Cleanrooms in pharmaceutical, biotechnology, electronics, and food processing plants
• Partitions in hospital wards, operating rooms, laboratories, and data centers
• Cold storage facilities, refrigerated warehouses, and food distribution centers
• Interior and exterior walls of industrial plants, large warehouses, and distribution centers
• Exhibition halls, sports arenas, and large-span commercial buildings
• Prefabricated houses, container homes, and modular construction projects

Features and Advantages of MOS Sandwich Panels

• High Structural Strength and Durability: The MOS core material is bonded to steel panels, delivering impact resistance and structural durability. This panel maintains dimensional stability over extended periods, resisting deformation and cracking under thermal cycling and mechanical loading.

• Non-Combustible: The core of magnesium oxysulfide sandwich panels does not ignite or release toxic fumes even at temperatures exceeding 1,200°C. This makes them suitable for hospitals, data centers, pharmaceutical facilities, and any structure where fire containment is critical.

• No Corrosion, No Sweating: MOS panels use magnesium sulfate instead of magnesium chloride, eliminating this problem. The result is a structurally stable panel with a longer service life and no risk of interior steel corrosion.

• Non-Toxic: MOS sandwich panels are manufactured without hazardous substances. They comply with green building standards and do not off-gas harmful compounds during installation or use.

• Moisture and Mold Resistance: The dense, low-porosity MOS core provides excellent resistance to moisture ingress, mold growth, and humidity-related degradation, making it well-suited for cold storage, food processing plants, and any humid or wet environment.

• Thermal Insulation: Magnesium oxysulfide panels with a thermal conductivity help maintain stable indoor temperatures and reduce heating and cooling loads, contributing to energy savings over the building's lifetime.

• Acoustic Performance: The dense, airtight solid core provides meaningful sound insulation, making MOS panels suitable for industrial and commercial spaces.

Installation of Magnesium Oxysulfide Sandwich Panels

Proper installation is critical to achieving the panel's performance. Follow these guidelines:

1. Substrate Preparation: Ensure wall or roof substrates are level, structurally sound, clean, and free of loose particles, dust, and grease. Proper substrate preparation is essential for loading the rated bond strength and load transfer between the panel and supporting structure.

2. Joint Sealing: Seal all panel joints and perimeter seams using a compatible, professional-grade sealant suitable for the application environment. Proper joint sealing prevents air infiltration and moisture ingress, thereby protecting the building's thermal insulation and long-term performance.

3. Fastening and Fixing: Select fasteners and fixing methods due to the project's structural design specifications. Fasteners must be capable of withstanding wind and seismic loads, or thermal expansion/contraction forces at the installation location.

4. Fire Safety During Installation: Although magnesium oxysulfide panels are non-combustible, maintain safe distances from open flames, welding equipment, high-temperature tools, and panel surfaces during installation. Protect panel surfaces from weld spatter and high-temperature damage.

5. Expansion Joint Provision: Install expansion joints at intervals specified in the project design to accommodate thermal expansion and contraction. Insufficient expansion joints may cause panel buckling or joint failure.

Frequently Asked Questions

What is the difference between MOS and MOC sandwich panels?

Magnesium Oxysulfide (MOS) panels use magnesium sulfate as the primary binding agent, making them completely chloride-free. Magnesium Oxychloride (MOC) panels use magnesium chloride, which can absorb moisture and cause corrosion of embedded steel over time—a problem commonly referred to as 'sweating.' MOS panels were specifically developed to eliminate these issues, offering greater long-term stability and lower water absorption.

Are MOS panels suitable for cold storage and food processing facilities?

Yes. The low water absorption rate (≤ 0.8%), moisture resistance, and Class A1 fire rating make MOS panels well-suited for cold storage rooms, refrigerated warehouses, and food-processing environments where hygiene, moisture control, and fire safety are all required.

How do I choose the panel thicknesses for my project?

Panels are available in thicknesses of 50 mm, 75 mm, 100 mm, 125 mm, 150 mm, and 200 mm. Thickness selection depends on the required thermal insulation (U-value), structural span, and load requirements for your specific application. Consult your project engineer or contact us for application-specific guidance.

Can MOS sandwich panels be used for exterior walls and roofing?

Yes. MOS sandwich panels with appropriate steel facing thicknesses (typically 0.5 mm or greater) and compatible joint sealants are suitable for both exterior wall cladding and roof applications. The multi-layer corrosion-resistant coating on the steel facings provides long-term weathering resistance.

How do I maintain Magnesium Oxysulfide sandwich panels?

MOS panels require minimal maintenance. Annual surface inspection, prompt repair of joint sealants or surface damage, and keeping drainage systems clear are the primary maintenance requirements. Clean surfaces with mild detergent and low-pressure water — avoid abrasive cleaning or high-pressure water directed at panel joints.

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