fiberglass XPS Foam sandwich panels manufacturer
Fiberglass XPS sandwich panels are made from a combination of fiberglass skins and XPS foam with a flat surface. Adopting a high-pressure curing process, they combine the common advantages. They have the characteristics of UV resistance, good heat preservation, high strength, and rigidity. They can replace traditional composite materials.
We can provide you with customized CNC machining, embedded reinforcing materials, and better UV resistance.
Features
Composite-box is a manufacturer specializing in fiberglass XPS sandwich foam panels. Its FRP skins are gel-coated and bonded using adhesives that do not come off. The core uses XPS (extruded polystyrene insulation), which is a continuous process that creates a closed-cell structure that is 99 percent waterproof. The surface is smooth, and the density and thickness of the foam core can be customized. It provides excellent thermal insulation with a service life of up to 50 years.
Strength can be enhanced through the use of FRP skin, which has excellent corrosion resistance, weather resistance, and waterproof performance.

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Application
Automotive sector:




Construction Sector:
Suitable for insulation layers in building roofs, wall panels, and exterior walls. Also applicable for farms and mobile homes. Enhances waterproofing, corrosion resistance, and offers excellent thermal insulation with improved soundproofing.

Marine Sector:
Used in manufacturing ships, pontoons, yachts, and fishing vessels. XPS foam features low density for stability, while its closed-cell design effectively prevents moisture penetration.

Industrial Applications:
Suitable for cold storage warehouses, equipment insulation casings, and thermal insulation applications. We offer customized fire-retardant properties to reduce costs and emissions. Extensive CNC machining capabilities are available.

Custom Fiberglass XPS Sandwich Panels
Fiberglass XPS sandwich panels offer numerous customization options. Below are the custom features we support:
Dimension Customization:
- Fiberglass skin thickness: 0.6–5mm
- XPS foam thickness: 10–120mm, with densities ranging from 70–205kg/m³
- Overall dimensions: Length ≤11.8m, width ≤3.2m
Appearance Customization:
- Fiberglass skin options: Zhanhe fiberglass woven fabric
- Surface textures: Checkered, bubble, fabric patterns, etc.
- Surface finishes: Matte, glossy, white, black, gray
- Special treatments: UV-resistant gel coating, flame-retardant process (adding flame retardants to achieve fire ratings B1/B2/B3). Our products contain no asbestos.
Customization Process:
Our customization process is straightforward. Clients provide specific requirements, including application scenarios and parameter specifications. Our team delivers precise evaluations and tailored solutions. After manufacturing samples, we conduct testing to ensure compliance with client specifications—such as fire ratings and waterproof performance—before proceeding to mass production. Our experts provide full support throughout order tracking and production. We strive to deliver the desired value and performance while offering the highest level of service.
Structure of fiberglass XPS
XPS foam
XPS stands for Extruded Styrene Foam Board, which has good insulation properties and is used for thermal insulation. It is a rigid closed-cell material that does not absorb water and has a long life.
FRP sheet
FRP is an excellent high-performance material, consisting of glass fiber reinforcement. It has high performance, high strength, and UV resistance.
Special Processing
CNC Machining: We offer CNC equipment for drilling, cutting, engraving, and other operations on sheet materials. This enables the creation of various shapes and functionalities. We possess multiple imported CNC machines.
Reinforced Structures: For applications in refrigerated trucks and RVs, we embed high-strength materials like aluminum tubes or FRP tubes within the sheet material. This significantly enhances its bending resistance and load-bearing capacity, ensuring minimal deformation over extended use.
Surface Treatment: We enhance performance through various coatings and processes, including UV-protective coatings and flame-retardant treatments, which modify material properties.
Composite Process: Our fully automated vacuum composite line bonds fiberglass and XPS foam with excellent adhesion, improving overall performance.
Advantages of Glass Fiber XPS Foam Sandwich Panels
- Superior Thermal Insulation: With thermal conductivity as low as 0.024–0.034 W/m·K, it effectively reduces energy consumption. Ideal for refrigerated transport and building insulation, maintaining stable temperatures.
- Lightweight and Easy to Process: Density ranges from 35–45 kg/m³, facilitating cutting and installation. Reduces vehicle weight, enhancing transport efficiency and operational convenience.
- Waterproof and Corrosion-Resistant: Closed-cell structure with water absorption below 1%, resisting moisture and chemical corrosion for long-term use in marine or industrial environments.
- Fire-Resistant and Durable: Meets Class B1 fire rating, withstands temperature fluctuations from -50°C to +80°C, and boasts a service life exceeding 20 years.
- Environmentally Sustainable: Recyclable material free of asbestos components reduces carbon emissions, meeting modern eco-standards for green building projects.
- High Cost-Effectiveness: Offers 20% cost savings compared to traditional materials. Lightweight design lowers maintenance and transportation expenses, enhancing overall economic efficiency.
Application of fiberglass XPS panel
This product is ideal for applications that require thermal insulation properties and waterproofing. For example, interior insulation, building insulation, vehicle insulation, etc.

Product Parameters
Product Specifications
| Item | Specification |
|---|---|
| Skin Material | FRP (Fiberglass Reinforced Plastic), CFRT (Continuous Fiber Reinforced Thermoplastic), Aluminum Sheet, Plywood, Stainless Steel Sheet, Aluzinc Steel, etc. |
| Core Material | XPS (Extruded Polystyrene Foam Board) |
| Total Thickness | 10~120 mm |
| Length Range | ≤12m |
| Width Range | ≤3.2m |
| Surface Treatment | Glossy, Matte, Embossed, etc. |
| Surface Color | RAL Color Series |
| Composite Method | Eco-friendly Adhesive |
| Processing Method | CNC Machining, Embedded Structure Reinforcement |
Technical Specifications
| Item | Specification |
|---|---|
| Core Density | 30~50 kg/m³ |
| Compression Strength | 0.1~1 MPa (depending on core thickness) |
| Flexural Strength | 36.966 MPa (Max Load: 2770.659N, Sample Size: 300x100x14 mm) |
| Operating Temperature | -50℃ ~ +80℃ |
| Waterproof Performance | Excellent, core material has 99% waterproof ability |
| UV Resistance | Excellent, FRP skin enhances UV resistance |
| Thermal Insulation | Excellent, XPS foam provides superior thermal insulation |
| Corrosion Resistance | Excellent, surface treatment enhances corrosion resistance |
| Moisture Resistance | Good, XPS foam has excellent moisture resistance |
| Expected Service Life | Up to 50 years |
| Core Density | 35~55 kg/m³ |
| Closed Cell Rate | ≥99% |
| Thermal Conductivity | 0.024~0.034 W/m·K |
| Water Absorption | ≤1% |
| Operating Temperature | -50℃ ~ +80℃ |
Custom Processing

Embedded Reinforcement Structures
To enhance strength and functionality, reinforcement materials can be embedded within composite panels. Options include plywood, aluminum alloy profiles, GRP tubes, steel structural components, and more.

Multi-Material Composite Processing
We specialize in composite processing of materials such as FRP, CFRT, and foam cores, delivering superior performance while meeting diverse application requirements.

High-Precision CNC Machining
Advanced CNC machining centers enable high-speed precision cutting, complex contour milling, drilling, and more.

Edge Processing
Edge finishing and connector integration are performed according to specific requirements. Services include edge wrapping, chamfering and grinding, waterproofing, and embedded nuts.
FAQ
why choose us?
Customer Satisfaction
Insisting on high quality products and servers, centered around customer experience.
Quality Assurance
We strictly control every production process to bring reliable quality assurance to our customers.
Advanced Production Line
The world’s top production line ensures product precision and efficiency.
Customization
We provide 100% customization, making orders less difficult.









