Product Details
What Is an FR-4 Fiberglass Panel?
Glass-fiber reinforcement and heat-resistant resin form a durable insulating board. Its smooth, pit-free surface supports drilling and precision machining, while heat, moisture and corrosion resistance suit molding, electronics and building applications.
Key Performance Data
Construction & How It Insulates
Woven glass-fiber layers and heat-resistant resin form a dense board.
Installed between mold and machine, the board limits heat transfer.
Fiberglass (FR-4) vs Cork / Wood Board
| Feature | Wonclean Fiberglass (FR-4) | Traditional Cork / Wood |
|---|---|---|
| Moisture resistance | High — no deterioration or mildew | Prone to moisture absorption |
| Temperature range | −30°C to +150°C | Limited stability |
| Surface quality | Flat, pit-free; controlled thickness | Variable / irregular |
| Processability | Excellent for drilling & injection | Moderate to poor |
Technical Specifications
| Material | FR-4 glass-fiber + heat-resistant composite resin (asbestos-free) |
| Glass-fiber content | 25–40% by weight |
| Temperature range | −30°C to +150°C |
| Max size | Width up to 3658 mm; length up to 12 m |
| Properties | High mechanical strength, dielectric insulation, heat & moisture resistance, machinable |
| Surface / color | High flatness, pit-free; standard gray / off-white (custom on request); steam-cleanable |
| Thickness | Controlled tolerance; customizable |
Where FR-4 Fiberglass Panels Are Used
Why Buy From Wonclean
Our factory and engineering team supply FR-4 boards and cleanroom systems to 40+ countries, with custom sizes, thicknesses and colors plus technical support.
Technical Insights & FAQ
Why is fiberglass preferred for injection-mold molding?
An FR-4 plate between mold and machine limits heat transfer, supporting temperature control and energy efficiency during molding.
What makes the white FR-4 light plate suitable for electronics?
Electrical insulation, a smooth surface and controlled thickness suit PCB test racks, ICT fixtures and precision star wheels.
Can these panels be used in high-moisture building areas?
High moisture resistance and low absorption suit ventilation ducts and wall or ceiling insulation in humid areas.
What temperature can the board withstand?
The specified service range is −30°C to +150°C for cold-storage and industrial insulation applications.
Is it safe and non-toxic?
The board is asbestos-free, with a steam-cleanable surface for low-maintenance use.
What sizes, thickness and colors are available?
Maximum dimensions are 3658 mm wide by 12 m long. Gray and off-white are standard; size, thickness and color can be customized.
Get Your Fiberglass (FR-4) Panel Quote
Share your application, size, thickness and color for a board recommendation and factory quote. Samples on request; typical reply within 24 hours.
