Durostone SG200 Polyester Glass

High‑strength insulation for high‑temperature electrical applications

Durostone® SG200 is a high‑performance fibreglass reinforced polyester laminate designed for demanding electrical environments. Engineered to retain excellent mechanical and electrical properties at elevated temperatures, SG200 delivers superior strength and thermal resistance, making it a reliable choice for critical insulation and structural components.

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Application Overview

Durostone® SG200 is widely used in high‑temperature electrical applications where conventional insulation materials may degrade. It is commonly specified for dry‑type transformers, layer insulation and high‑temperature NEMA GPO‑1 applications requiring both electrical reliability and mechanical robustness.

What We Solve For

Electrical and transformer applications often face challenges from heat, mechanical stress and long‑term material degradation. Durostone® SG200 addresses these challenges by offering exceptional heat resistance, high mechanical strength and stable electrical insulation, ensuring long service life in demanding operating conditions.

TECHNICAL

Features & Functionality

Functionality & Options

Suitable for high‑temperature electrical insulation
Designed for dry‑type transformers and layer insulation
Replacement for epoxy‑bonded mica systems
Supplied as sheets or machined components
Cut‑to‑size and profile machining available
Suitable for short‑run or volume production

Key Technical Specifications

Fibreglass reinforced polyester resin laminate
UL Temperature Index: 210 °C (Electrical & Mechanical)
High tensile, flexural and compressive strength
Low water absorption (approx. 0.3%)
High CTI (>600) for excellent tracking resistance
NEMA Grade GPO‑1 performance class
Standard sheet size: 1200 × 2440 mm
Thickness range: approx. 0.8 mm to 50.0 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

ADVANTAGES

Why Choose Durostone® SG200

Durostone® SG200 is a dependable solution for high‑temperature electrical insulation where both thermal stability and mechanical strength are critical. Designed to perform reliably in demanding electrical and transformer environments, it offers confidence through proven performance, long service life and consistent material quality.

Proven Transformer Performance

Specifically suited for oil‑filled transformers, our presspaper and pressboard deliver consistent insulation properties, ensuring stable electrical performance and extended equipment lifetime.

High Purity for Critical Applications

The absence of binding agents and the use of high‑purity cellulose minimize contamination risks, making these materials ideal for sensitive electrical and capacitor applications.

Flexible Formats & Thicknesses

With availability in rolls, sheets and boards, and clear differentiation based on material thickness, our products offer design flexibility for a wide range of electrical insulation needs.

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.