Magnesium Oxide Non removable Formwork

 

Magnesium Oxide Non-removable Formwork, commonly referred to as MGO permanent formwork, is a one-time cast-in-place concrete formwork material. Primarily taking active magnesium oxide as the core substrate, it is compounded with alkali-resistant fiberglass mesh and multiple functional modified additives. After concrete pouring and curing, the formwork is permanently retained on the structure. It integrates closely with concrete and serves multiple functions, working as a structural formwork, protective layer, and basic decorative base in one integrated solution.

1. Definition of MGO Boards

MGO permanent formwork is a new type of inorganic mineral composite panel. It is manufactured by scientifically proportioning magnesium oxide, magnesium chloride or magnesium sulfate, fiberglass mesh, lightweight fillers and functional modifiers, followed by standardized curing under controlled temperature and humidity conditions.

Its core working principle relies on the inherent advantages of magnesia-based materials, including high structural strength, excellent interfacial adhesion, outstanding fire resistance and stable moisture resistance. During concrete construction, it effectively resists the lateral pressure of fresh concrete. After the concrete hardens, the formwork forms a dual bonding system through chemical reaction and physical occlusion with the concrete. It eventually becomes an integral permanent part of the building structure, eliminating the need for formwork removal and secondary plastering procedures.

2. Raw Materials and Production Process

2.1 Core Raw Materials

Active Magnesium Oxide (MgO): The key cementitious component of the panel, which determines the structural strength and interfacial bonding performance of the formwork.

Modifiers: Mainly magnesium chloride (MgCl₂) or magnesium sulfate (MgSO₄), used to form a stable and durable magnesia cementing system and ensure overall structural stability.

Reinforcing Materials: Medium and alkali-resistant fiberglass mesh, which significantly improves the flexural resistance and impact resistance of the panel, avoiding brittle fracture.

Lightweight Fillers: Including perlite and talcum powder, which reduce the overall density of the product and appropriately enhance its thermal insulation performance.

Functional Additives: Water repellents, anti-efflorescence agents and setting retarders, which optimize the water resistance, weather resistance and construction adaptability of the formwork.

2.2 Production Flow of MGO Boards

Batching and Slurry Mixing: Raw materials including magnesium oxide, cementitious binders, lightweight fillers and special modifiers are proportioned and stirred uniformly to form a stable composite slurry.

Layered Paving and Compaction: Fiberglass mesh is laid inside standardized molds as the reinforcing layer, and the prepared slurry is paved layer by layer with mechanical compaction to ensure uniform density and internal compactness.

Intelligent Curing: The semi-finished panels are cured under normal temperature or mild heating conditions to complete hydration reaction steadily, gradually forming stable mechanical strength and structural toughness.

Fixed-size Cutting and Finishing: Cured finished boards are cut into standard specifications with edge trimming and surface finishing to produce qualified flat panels and special-shaped formwork shells.

 

About Magnesium Oxide Non‑removable Formwork

 

3. Key Advantages of MGO Permanent Formwork

3.1 Reliable Structural and Mechanical Performance

MGO permanent formwork delivers steady and dependable mechanical performance for on-site concrete construction. With a compressive strength above 20 MPa and flexural strength over 15 MPa, it can fully withstand the lateral pressure exerted by fresh concrete during pouring, meeting the requirements of most conventional building construction scenarios. Differing from traditional formwork materials, this MGO panel features a lightweight structure with a density ranging from 0.8 to 1.2 g/cm³. It is roughly one-fifth the weight of steel formwork and one-third that of wooden formwork, effectively cutting down transportation and on-site hoisting costs. Additionally, the formwork achieves a bonding strength of more than 1.0 MPa with concrete. The tight combination between the panel and concrete forms an integrated stress-bearing structure, greatly boosting the overall stability and structural integrity of building components.

3.2 Excellent Fire Resistance and Environmental Friendliness

Classified as A1 non-combustible material, the highest fire safety grade for building materials, MGO formwork can endure extreme high temperatures between 800°C and 1200°C. In the event of a fire, it will not catch fire, produce molten drips, or release harmful toxic gases, providing stable and long-lasting fire protection for building structures. Made entirely of inorganic mineral raw materials, the panel contains no formaldehyde, volatile organic compounds (VOCs) or other harmful substances. It supports recycling and reuse after dismantling in special scenarios, which greatly reduces construction waste output and lessens the environmental burden throughout the entire construction and building operation cycle.

3.3 Superior Weather Resistance and Long Service Life

Optimized with professional modified formulas, MGO formwork boasts strong waterproof and moistureproof capabilities, with water absorption controlled below 10%. It maintains stable dimensions and will not expand or deform even in long-term humid indoor and outdoor construction environments. The special anti-efflorescence treatment also effectively avoids surface whitening and quality defects caused by environmental changes. Thanks to its unique inorganic material properties, the panel resists common building damages including mildew growth, termite infestation, as well as acid and alkali corrosion. Its durable performance allows it to serve alongside the building for its full service life.

3.4 Simplified Construction and Outstanding Economic Value

The permanent non-removable design of MGO formwork streamlines traditional construction processes. It eliminates the need for formwork dismantling, surface cleaning and follow-up maintenance work on site, saving substantial labor resources and shortening the overall construction period by over 30%. The smooth and flat surface of the finished formwork can be directly used as the base layer for wall painting, tile laying and stone cladding, removing the step of secondary plastering. From a comprehensive cost perspective, this product cuts multiple expenditures including labor costs, formwork turnover investment, scaffolding layout fees and construction waste disposal costs, delivering remarkable cost performance for engineering projects.

4. Product Types and Standard Specifications

4.1 Product Classification by Shape

Flat Panel: Standard flat panels are the most commonly used type, suitable for wall bodies and floor soffit construction. The conventional thickness of mainstream products ranges from 8 mm to 15 mm, adapting to most conventional residential and commercial building structures.

Formwork Shell: Pre-fabricated ribbed and honeycomb formwork shells are customized for hollow floors and ribbed slab structures. This structural design effectively reduces the self-weight of building floors while greatly improving the overall rigidity and structural bearing capacity of slabs.

Special-shaped Components: To meet the construction needs of complex building structures, customized special-shaped accessories are available, including corner connectors, structural joint boards and beam-column matching parts, which realize seamless assembly of formwork in diverse construction scenarios.

4.2 Conventional Size Specifications

Flat Panel: Two mainstream standard sizes are widely adopted in engineering: 1220×2440 mm and 915×1830 mm. Multiple optional thicknesses (8 mm, 10 mm, 12 mm, 15 mm) can be selected according to actual structural load and construction requirements.

Formwork Shell: The mainstream specifications for formwork shells are 500×500 mm and 600×600 mm, with adjustable heights from 100 mm to 300 mm, catering to the design requirements of different hollow floor structures.

 

 

 

 

Key Construction Procedures

• Setting out: Mark formwork lines and elevations.
• Support framework: Install light steel or wood keels at spacing ≤ 400 mm to ensure flatness.
• Panel installation: Leave 3–5 mm expansion joints between boards, fix with self‑tapping screws at spacing ≤ 200 mm.
• Joint treatment: Reinforce internal and external corners with special accessories or glass fiber mesh to prevent grout leakage.
• Reinforcement and pouring: Follow normal procedures; avoid strong impact on panels during vibration.

 

Typical Applications

• Residential buildings: Shear walls, floors, stairs, basement walls.
• Commercial & industrial buildings: Floors, firewalls, roof bases in shopping malls, factories and warehouses.
• Underground engineering: Subways, tunnels, underground garage linings and ceilings.
• Prefabricated construction: Combined with steel trusses as permanent floor formwork for industrialized construction.
• Special environments: Damp, high‑temperature or high fire‑risk areas such as kitchens, machine rooms and chemical workshops.

Item	MGO Nonremovable Formwork	Plywood Formwork	Steel Formwork	Aluminum Formwork
Removable?	Permanent	Removable	Removable	Removable
Fire Rating	Class A1 noncombustible	Flammable	Noncombustible	Noncombustible
Water & Moisture Resistance	Excellent	Poor (easily deformed)	Fair (prone to rust)	Fair (oxidation)
Construction Efficiency	Very high	Low	Medium	High
Overall Cost	Low	Medium	High	High
Environmental Impact	Excellent	Fair	Fair	Fair

 

 

 

Our Service：

We can provide customized products. We have strict quality control and test each batch of products in the laboratory and check each sheet before packing. We have a well-established sales team that can answer your questions at any time.

 

Magnesium Oxide Non-removable Formwork Factory

 

Our Company：

We are a company dedicated to magnesia cement products. Our main products are Magnesium Oxide Boards (MGO Board) for construction and laminated MgO boards with for furniture and renovation. Our mission is to provide the world's construction markets with environmentally friendly, high-performance and sustainable green materials.

We work with China Magnesium Materials Association (CMMA) and Magnesium Oxide Association (MOCA) in North America to raise awareness and promote the use of magnesium oxide cement products. We focus on the quality control and consistency of the MGO products. We have been actively involved in developing American Society for Testing and Materials (ASTM) standards related with MGO products.

 

FAQ:

Q: What is your delivery time?

A: 1 month after receiving the deposit. Curing time shorter than 3 week may cause quality problem.

Q: Can you customize products?

A: Yes, customized color and size are available, OEM orders are welcomed.

Q: What is your MOQ? Can we order a mix of different sizes?

A: Yes. The MOQ is 100 pieces and mixed loading is also acceptable.

Q: How about the samples?

A: Free samples with shipping cost.

 

Packing and Shipping:

Packaging and Shipping of Fire Resistant Tile Backer Boards

 

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