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Fiberglass Black G10 Sheet/Plate for Making Surfing Fins & Hydrofoil Wings

FR4 laminates is a fire rated electrical-grade, dielectric fiberglass laminate epoxy resin system combined with a glass fabric substrate.

The abbreviation "FR4" means: F (for flame) and R (for retardant), # 4 epoxy.

FR4 grades offer excellent chemical resistance, flame ratings (UL94-VO) and electrical properties under dry and humid conditions. FR4 also features high flexural, impact, superior mechanical strength and bond strength at temperatures up to 130°C. FR4 is suitable for structural, pc boards and electrical applications.
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  • SR-FR4G10

  • Shengrui

Product Information

G10 material is a composite material made of glass cloth and epoxy resin. It was developed as an aircraft material when it was invented, it can withstand great strength. G-10 is not permeable with water and liquid, and it has the characteristics of insulation, anti-acid and alkali, and the weight is light. 

A continuous woven glass fabric laminated with an epoxy resin. This grade is extremely high in mechanical strength, has low water absorption and dissipation factors and has superior electrical characteristics, which are exhibited over a wide range of temperatures and humidities.

Technical Data:

No. Property Unit Requirment Test Result Test Method
1 Flexural strength A Direction MPa ≥340 417 Specified in GB/T1303.1_1998
B Direction ≥340 506
2 Modulus of elasticity  in flexure A Direction MPa - 2.43 X 104
B Direction - 2.24 X 104
3 Compressive strength MPa - 598
4 Charpy impact strength(notched) A Direction kJ/㎡ ≥33 75.7
B Direction ≥33 56.2
5 Shear strength parallel to laminations A Direction MPa - 64.7
B Direction - 67.8
6 Tensile strength A Direction MPa - 443
B Direction - 345
7 Dielectrical strength at 90℃±2℃ in oil perpendicular to laminations (20s step-by-step test) kV/mm ≥11.8 15.4
8 Breakdown voltage at 90℃±2℃ in oil perpendicular to laminations (20s step-by-step test) kV ≥35 100
9 Relative permitivity(50Hz) - - 4.77
10 Insulation resistance after immersion in water A Direction Ω ≥5.0 X 1010 1.9 X 1014
B Direction ≥5.0 X 1010 8.2 X 1013
11 Deflection temperature  under flexual load(Tff 1.8) - >240
12 Water absorption mg ≤25 8.8
13 Bonding strength N - 8741



The product is widely used high-end insulation parts processing, FPC (flexible printed circuit-board) reinforcement sheet, planetary wheel, transformer insulation baffle, high voltage switch, gasket, insulation washer, electronic insulation parts, various water sports equipment like G10 surf fins and blade-tool grips materials.


1.Dimension:Standard:36''×48'', 40''×40'', 40''×48'',48''×80'',48''×96''.Or customized.




1. Q: Are you factory?

A: Yes, We are factory.

2. Q: How about the delivery time?

A: Depends on order quantity.

3. Q: Can I get free sample for check?

A: Sample can be provided for free if we can burden the express charge.

4. Q: Can you give me a discount price?

A: More quantity, more discount you can get.



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Attn: Paul Zhang
Tel: +86-20-86300989
Fax: +86-20-86300990
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