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Durustone® UPM S1 Polyester Glass Laminate

Thermal Stability
High Impact Resistance
Consistent Material Quality

High‑performance insulation for demanding electrical environments

Durustone® UPM S1 is a premium glass fibre reinforced polyester laminate engineered for use in switchboards and switchgear. It delivers an exceptional balance of mechanical strength, electrical insulation and flame resistance, exceeding the performance of conventional GPO‑3 and moulded polyester glass products.

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Application Overview

Durustone® UPM S1 is specifically developed for structural insulating components in electrical systems where reliability, safety and long‑term performance are critical. Typical applications include busbar supports, cleats and load‑bearing components within low‑ and medium‑voltage equipment.

What We Solve For

Electrical infrastructure demands materials that can withstand mechanical stress, electrical loads and thermal exposure—without compromising safety. Durustone® UPM S1 solves this by combining high mechanical strength, excellent electrical properties and V0 flame retardancy into one versatile composite solution.
TECHNICAL

Features & Functionality

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Superior Electrical Insulation

Provides high dielectric strength and excellent tracking resistance for safe, reliable electrical performance.

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High Mechanical Strength

Offers outstanding bending, compressive and impact strength to support heavy electrical components.

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Flame Retardant Performance

UL 94 V0 rated for enhanced safety in enclosed electrical environments.

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Low Moisture Absorption

Maintains dimensional stability and performance even in humid or variable conditions.

Functionality & Options

  • Suitable for structural insulating components
  • Excellent machinability for custom‑designed parts
  • Available as cut‑to‑size sheets or fully machined components
  • Short‑run, specialty or high‑volume production options
  • Compatible with complex switchgear and switchboard designs

Key Technical Specifications

  • Glass fibre reinforced polyester resin composite
  • Density: approx. 1.85 g/cm³
  • Electrical strength (perpendicular): approx. 13 kV/mm
  • Comparative Tracking Index (CTI): 600
  • Thermal endurance: 155°C (Insulation Class F)
  • Water absorption: < 0.5%
  • Flammability: UL 94 V0

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Durostone® UPM S1

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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 Durustone® UPM S1

Durustone® UPM S1 is a dependable composite solution for switchboards and switchgear, combining electrical safety, mechanical strength and flame resistance to ensure long‑term performance in demanding electrical applications.

Built for Electrical Safety
Durustone® UPM S1 is engineered specifically for electrical insulation, helping reduce the risk of tracking, arcing and failure in critical systems.
Strength Where It Matters
With excellent mechanical performance, it provides long‑term structural support even under continuous load and vibration.
Proven & Trustworthy
Manufactured to strict quality standards, Durustone® UPM S1 is a dependable solution trusted in switchboard and switchgear applications worldwide.
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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We built for reliability, safety, and compliance — our products are designed to perform in the toughest environments. Talk to our team to ensure you're specifying the right product for your application.
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