G10 FR4 Fiberglass Insulation Sheet – 335x300mm Epoxy Board for CNC & Electrical Use
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Standard shipping is included in the price of listed standard-size products. Contact us for expedited shipping or delivery arrangements for custom or oversized orders. Returns are accepted for quality problems under our refund policy, without limiting applicable statutory rights.
- yellow 300mmx335mm(11.8" × 13.2") / 0.5mm(0.02") - $28.44
- yellow 300mmx335mm(11.8" × 13.2") / 1mm(1/25") - $28.76
- yellow 300mmx335mm(11.8" × 13.2") / 1.5mm(1/16") - $29.07
- yellow 300mmx335mm(11.8" × 13.2") / 2mm(1/12") - $30.62
- yellow 300mmx335mm(11.8" × 13.2") / 3mm(1/8") - $34.04
- yellow 300mmx335mm(11.8" × 13.2") / 4mm(5/32") - $36.17
- yellow 300mmx335mm(11.8" × 13.2") / 5mm(3/16") - $42.68
- Black 300mmx335mm(11.8" × 13.2") / 0.5mm(0.02") - $27.12
- Black 300mmx335mm(11.8" × 13.2") / 1mm(1/25") - $27.44
- Black 300mmx335mm(11.8" × 13.2") / 1.5mm(1/16") - $27.76
- Black 300mmx335mm(11.8" × 13.2") / 2mm(1/12") - $28.64
- Black 300mmx335mm(11.8" × 13.2") / 3mm(1/8") - $32.72
- Black 300mmx335mm(11.8" × 13.2") / 4mm(5/32") - $34.88
- Black 300mmx335mm(11.8" × 13.2") / 5mm(3/16") - $37.32
- Green 300mmx335mm(11.8" × 13.2") / 0.5mm(0.02") - $26.84
- Green 300mmx335mm(11.8" × 13.2") / 1mm(1/25") - $27.44
- Green 300mmx335mm(11.8" × 13.2") / 1.5mm(1/16") - $28.44
- Green 300mmx335mm(11.8" × 13.2") / 2mm(1/12") - $32.04
- Green 300mmx335mm(11.8" × 13.2") / 3mm(1/8") - $33.45
- Green 300mmx335mm(11.8" × 13.2") / 4mm(5/32") - $35.06
- Green 300mmx335mm(11.8" × 13.2") / 5mm(3/16") - $37.00
PRODUCT DETAILS
G10 FR4 Glass Fiber Sheet – 335×300mm (13.2" × 11.8")
Flame Retardant | Electrical Insulation | CNC Machinable | Custom Sizes Available
Unlock Precision and Protection with G10 FR4 Fiberglass Sheets
Our high-quality G10 FR4 glass fiber sheet is engineered for demanding industrial, electrical, and mechanical applications. Made from durable epoxy resin reinforced with woven fiberglass, this sheet offers excellent flame retardancy, high mechanical strength, and outstanding electrical insulation properties.
Whether you're fabricating custom insulating components or need reliable backing plates for high-voltage systems, this fiberglass laminate sheet is designed to deliver.
Available in Light Green, Black, and Yellow – each panel measures 335mm × 300mm (13.2" × 11.8") with multiple thickness options ranging from 0.5mm (0.02") to 5mm (3/16").
🧩 Key Features & Benefits
| Feature | Advantage | Benefit to You |
|---|---|---|
| G10 FR4 Epoxy Laminate | Heat & flame resistant (up to 200°C) | Protects your equipment in high-temperature environments |
| Excellent Electrical Insulation | Dielectric strength >18kV/mm | Ideal for transformers, motors, PCB insulation |
| Precision Cut | CNC, laser, engraving supported | No edge fray, ideal for prototyping or high-tolerance parts |
| Multi-color options | Light Green / Black / Yellow | Easy color coding for system identification |
| Wide Thickness Range | 0.5mm to 5mm (0.02" to 3/16") | Covers everything from thin spacers to structural panels |
| Custom Sizes Available | Based on drawings or specifications | Tailored to your project, no material waste |
| Eco-Conscious Material | RoHS & CE certified | Safe for both you and your environment |
📐 Technical Specifications
| Property | Value |
|---|---|
| Product Type | G10 / FR4 Epoxy Resin Board |
| Material | Fiberglass Epoxy Laminate |
| Size (L × W) | 335mm × 300mm (13.2" × 11.8") |
| Thickness Options | 0.5mm (0.02") to 5mm (3/16") |
| Available Colors | Light Green, Black, Yellow |
| Temperature Resistance | 150–200°C |
| Flame Retardancy | UL94-V0 |
| Dielectric Strength | >18kV/mm |
| Density | ~1.85 g/cm³ |
| Surface Finish | Smooth CNC-milled |
| Machinability | CNC milling, laser engraving |
| Certifications | CE, RoHS |
🛠 Applications
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Electrical insulation partitions and backing plates
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PCB backing boards & FPC reinforcement
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Motor and transformer insulation
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Precision gaskets and flame-resistant barriers
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Custom CNC machined jigs, spacers, fixtures
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Lithium battery insulation and high-voltage isolation
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Potentiometer and carbon film printing baseboards
✨ Why Choose Custominsul?
✔ Wide Plastic Selection
We offer not just G10, but hundreds of engineering plastics in sheets, rods, and custom forms.
✔ Precision Customization
Laser cutting, CNC engraving, UV printing, and full drawing-based production – we help you build exactly what you need.
✔ Dedicated to Your Budget
We understand cost matters – that’s why we minimize waste, recommend alternatives when available, and support free standard shipping to help you reduce total spending.
✔ Trusted by Engineers Worldwide
With 15+ years of material service experience, we're your partner in every custom build or mass production run.
🔧 Customization Process
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Send us your drawing or specs (PDF, CAD, Sketch ok)
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We confirm feasibility and quote within 1 business day
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Free standard shipping included for eligible orders
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Fast production with CNC/lasing precision
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Ongoing support for revisions, duplicates, or scaled production
👉 Need a custom shape or thickness? Contact us now or upload your drawing via our Contact Page.
❓ Frequently Asked Questions (FAQ)
Q1: Is this G10 sheet suitable for high-voltage electrical insulation?
Yes. It offers excellent dielectric strength (>18kV/mm) and UL94-V0 flame retardancy – perfect for transformers, PCBs, and motor insulation.
Q2: Can I cut the sheet at home?
You can cut thinner versions with saws or rotary tools, but for clean and precise edges, we recommend CNC or laser cutting – which we can do for you.
Q3: Are custom thicknesses available beyond 5mm?
Yes. We can supply thicknesses up to 50mm on request – just send your requirements.
Q4: Will there be surface marks or scratches?
Minor marks from cutting or handling are possible. For appearance-critical projects, let us know – we offer polishing and protective film services.
✅ Choose Your Size & Color Now
🟢 Ready to ship standard panels in Light Green, Black, or Yellow
📏 Thicknesses: 0.5mm (0.02") – 5mm (3/16")
🔧 Need custom shape or holes? We support full machining & engraving
🛒 Add to Cart or Request a Quote today!
REVIEWS
SHIPPING & RETURNS
Shipping
Standard shipping is included in the price of listed standard-size products. For expedited shipping, custom or oversized orders, or a delivery deadline, contact us to confirm available arrangements and any additional charges before ordering. See our shipping policy for details.
Returns and quality problems
Our voluntary return policy covers quality problems; we do not offer change-of-mind returns. This does not limit applicable statutory rights, including withdrawal rights for eligible consumer purchases. For the return process and eligibility, see our refund policy.
If an item is defective, damaged or incorrect, email Custominsul@Custominsul.com with your order number, a description and clear photos. Please contact us before shipping an item back.
CUSTOM FABRICATION
Can't Find the Right Size or Specification?
Send your drawing or dimensions, material grade if known, quantity and intended use. We review feasibility and confirm the specification for each quoted project.
Project Requirements
Identify the critical dimensions, tolerances, surface finish and inspection requirements. Any required food-contact, ESD, flame-retardant or other compliance documents should be specified so availability can be checked. Material names alone do not establish these properties.
Custom Order Process
Submit the requirements for review. The quotation will identify the agreed specification, quantity, production lead time and inspection requirements. Shipping method, shipping charges and tax responsibilities are confirmed separately from production timing. Approve the final quotation and specification before ordering.
Send Your Drawing or Requirements
Use the enquiry form to send your project details and a file link, or email drawings to Custominsul@Custominsul.com. Include the product and specification. If the material grade or tolerance is uncertain, describe the intended use for review.
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Share your project details, selected material and quantity on our quote page. You can add a file link or use the email drawing route shown there.
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