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G10, G11, FR4 Epoxy Glass

Multiple Product Forms
Consistent Material Quality

Versatile epoxy glass insulation for electrical and mechanical performance

G10, G11 and FR4 epoxy glass laminates are high‑strength, woven glass fibre composites bonded with epoxy resin for demanding electrical and mechanical applications. Available in multiple grades, these laminates offer excellent insulation performance, mechanical integrity and environmental resistance across a wide operating temperature range.

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Application Overview

Epoxy glass laminates are widely used in motors, generators, transformers and switchgear, as well as industrial and marine applications where strength, insulation and dimensional stability are essential. Grade selection allows optimisation for flame resistance, elevated temperature performance or general‑purpose electrical insulation.

What We Solve For

Electrical and electro‑mechanical systems require materials that can maintain insulation performance under load, heat and moisture exposure. G10, G11 and FR4 laminates solve this by delivering reliable electrical insulation, high mechanical strength and durable performance in harsh environments, with options tailored to application requirements.
TECHNICAL

Features & Functionality

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High Mechanical Strength

Provides excellent flexural and impact strength, supporting structural and load‑bearing insulation components.

Reliable Electrical Insulation
Excellent Electrical Insulation

Offers strong dielectric performance with low dissipation factor for stable electrical operation.

Thermal Performance Options
Thermal Performance Options

G10 supports general‑purpose use, G11 offers enhanced elevated‑temperature performance, and FR4 provides flame‑retardant protection.

Excellent Machinability
Excellent Machinability

Easily machined to precise tolerances using standard fabrication methods, enabling complex components.

Functionality & Options

  • G10 for general‑purpose electrical and mechanical insulation
  • G11 for higher temperature, F‑class electrical applications
  • FR4 for flame‑retardant electro‑mechanical applications
  • Supplied as sheets, rods, tubes, washers and machined parts
  • Suitable for dry, humid and corrosive environments
  • Cut‑to‑size and full machining services available

Key Technical Specifications

  • Woven glass cloth reinforced epoxy laminate
  • Density: approx. 1.7 – 1.9 g/cm³
  • High flexural and impact strength
  • Strong dielectric strength in air and oil
  • Low moisture absorption
  • Operating temperature range:
G10: cryogenic to ~155 °C
G11: enhanced strength retention at elevated temperatures
FR4: flame‑retardant, self‑extinguishing grade
  • Wide thickness range up to approx. 150 mm
EXPERIENCE

Our Projects Featuring Insulect Industrial Materials

Explore our project highlights to see where Insulect industrial materials are making an impact.
For tailored advice on whether this solution suits your network, please connect with our team here.

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Fortescue Aldoga, New 275kV Substation Switchgear
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Fortescue Future Industries 275 kV Substation Project

Where you'll find our industrial materials

You'll find Insulect-supplied and installed industrial materials across Australia and New Zealand.

ADVANTAGES

Why Choose G10, G11 & FR4 Epoxy Glass Laminates

G10, G11 and FR4 epoxy glass laminates provide a flexible, proven insulation solution for a wide range of electrical and mechanical applications. With grade options to suit temperature, flame resistance and performance requirements, these materials offer dependable strength, electrical reliability and fabrication versatility for demanding environments.

Grade Flexibility for Exact Requirements
Multiple epoxy glass grades allow material selection based on flame resistance, temperature performance or general‑purpose insulation needs.
Proven Electrical & Mechanical Reliability
These laminates are widely specified for electrical equipment due to consistent insulation performance and structural strength.
Easy to Specify & Fabricate
With broad availability, excellent machinability and multiple product forms, epoxy glass laminates integrate easily into new or existing designs.
IMPLEMENTATION

Services & Support

Insulect offers comprehensive services and support for the products we manufacture and specialise in, enhancing value for local utilities, major energy users, equipment manufacturers, and service operators.

LOCAL TECHNICAL TEAM

Our local technical team provides exceptional support and expertise, ensuring quick response times and personalised service to tackle any challenges that may arise during project execution.

  
ENGINEERING DESIGN

Our team utilises advanced technology and industry knowledge to develop innovative and efficient high voltage switchgear solutions, customised to fit the unique requirements of each project.

  
PROCUREMENT & LOGISTICS

We facilitate smooth procurement and logistics processes by sourcing from trusted, proven partners and coordinating timely deliveries, ensuring projects remain on schedule and within budget.

  
TESTING & COMMISSIONING
Professional testing and commissioning support ensures that every high-voltage switchgear system functions safely and reliably, adhering to all regulatory standards and client expectations.
  
TURNKEY PROJECT DELIVERY

We are able to oversee every phase from concept to completion, providing comprehensive solutions that simplify complex projects and ensure successful outcomes.

  
FACTORY VISITS
We facilitate client visits to our local manufacturing sites here in Australia, as well as overseas, for initial inspection as well as factory acceptance testing.
  
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