Custom FR4 Fiberglass Sheet – 0.5mm to 5mm – CNC Cut Epoxy Board for PCB & Insulation

High-Performance FR4 Fiberglass Epoxy Sheets – 0.5mm to 5mm Thickness – Custom Insulation Boards for PCB, CNC & Industrial Use

Looking for a high-strength, flame-retardant insulation material for your next project? Our FR4 Fiberglass Epoxy Sheets, available in thicknesses from 0.5mm (0.02") to 5mm (3/16"), are the perfect solution for a wide range of applications including PCB substrate fabrication, electrical insulation panels, high-temperature gaskets, and precision CNC machining. Made from glass fiber reinforced epoxy resin, these water green FR4 boards offer excellent mechanical properties, high dielectric strength, and outstanding dimensional stability. Whether you're building circuit boards, insulating industrial equipment, or creating custom electrical enclosures, our epoxy resin boards provide the reliable performance you need. Available in multiple sizes from 100×100mm (4" × 4") to 500×300mm (19.7" × 11.8"), these sheets are designed for both prototyping and bulk manufacturing.

Engineered for Durability, Precision, and Versatility

Our FR4 boards are manufactured from premium-grade fiberglass and epoxy resin, delivering exceptional resistance to moisture, chemicals, and heat. With a thermal rating up to 155°C (311°F) and flame-retardant properties (UL94 V-0), these boards are ideal for harsh and high-voltage environments. The epoxy core structure ensures rigidity and dimensional stability even under thermal or mechanical stress, making it ideal for electrical insulation sheets, custom CNC FR4 parts, and PCB mounting boards.

Custom Sizes and Machining Options Available

Every project is unique. That’s why we offer a wide range of standard sizes and custom fabrication services, including:

• CNC cutting

• Laser cutting

• Drilling and engraving

• Precision tolerance machining

Whether you need a few sheets or a full production run, BeePlastic delivers fast, accurate, and cost-effective solutions tailored to your design.

Why Choose BeePlastic for Your FR4 Needs

At BeePlastic, we don’t just sell plastic – we help you solve problems. With our extensive inventory of industrial materials and a highly experienced engineering team, we provide:

• ✅ A wide variety of insulation and engineering plastics

• ✅ Expert custom processing – CNC, laser, milling, and more

• ✅ Exceptional customer support from quotation to delivery

• ✅ Flexible order quantities with no MOQ on most custom requests

• ✅ Competitive pricing designed to save your project costs

We work closely with engineers, manufacturers, and buyers around the world to deliver high-quality, application-ready products on time and on budget.

Technical Specifications

• Material: FR4 Glass Fiber + Epoxy Resin

• Color: Water Green

• Thickness Options: 0.5mm (0.02") / 1mm (0.04") / 1.5mm (1/16") / 2mm (1/12") / 3mm (1/8") / 4mm (5/32") / 5mm (3/16")

• Sheet Sizes: 100×100mm (4"×4") to 500×300mm (19.7"×11.8")

• Dielectric Strength: >12kV/mm

• Max Operating Temperature: 155°C (311°F)

• Flame Resistance: UL94 V-0

• Moisture Absorption: Low

• Origin: Mainland China

Ideal Applications

• PCB fabrication and testing

• Electrical insulation panels

• CNC insulation parts and structural spacers

• Battery protection boards

• Industrial and automation equipment components

• High-frequency, high-voltage projects

Act Now – Stock Sizes Ready to Ship

Need reliable FR4 fiberglass insulation sheets in precise dimensions? We’ve got you covered. Choose your desired size and thickness from our available options and enjoy fast shipping, professional customer service, and custom processing support.

👉 Add to Cart Now to start your project with confidence.
🛠 Need a custom-cut FR4 sheet or machining service? [Contact us now] to get a free quote tailored to your needs. We’re here to help you reduce costs and deliver results.