Thermal Insulation

Thermal insulating materials are engineering materials that reduce the transfer of heat between objects and environments. Due to their low thermal conductivity, such materials are ideal for insulating an area and protecting sensitive equipment, simply by controlling surface temperatures. Thermal insulation material comes in many forms including sheets, bulk fibre, as well as rods and bars.

How Does Thermal Insulation Work?

A thermal insulator functions by reducing the three forms of heat transfer: conduction, convection and radiation:

• Conduction is minimised as the thermal insulating material has low thermal conductivity, slowing heat flow through solid matter.
• Convection is reduced by trapping air or gas within the structure, preventing the movement of heat by fluid motion.
• Radiation is controlled by reflective surfaces or barriers within the heat proofing material. The result is a reliable barrier that maintains stable temperatures and prevents unwanted energy loss.

Applications of Thermal Insulation

Power Generation and Heavy Industry

Industrial thermal insulation is used in boilers, turbines and piping systems to maintain energy efficiency, protect workers and reduce surface temperatures.

Manufacturing and Processing

In factories, industrial heat insulation is used in lagging vessels, ovens and furnaces, as well as for heat shielding in high-temperature processes.

Electronics and Electrical Systems

A thermal or heat insulation sheet is used in electronics to prevent the overheating of sensitive components.

Automotive and Transport

High heat insulation is applied in vehicles to manage engine heat, exhaust systems and passenger comfort by reducing thermal transfer.

Construction and Building

Heat proofing sheets and boards provide thermal breaks in walls, roofs and floors, ensuring buildings remain energy efficient and comfortable.

Food and Pharmaceuticals

Thermal insulating material is applied in cold storage, refrigeration units and transport containers to maintain consistent temperatures.

Types of Thermal Insulation

By Form

• Thermal Insulation Sheets: These versatile, easy-to-install sheets are ieal for wrapping pipes, ducts and irregularly shaped surfaces.
• Rigid Boards: These are pre-formed panels made of materials like polystyrene or mineral wool. They are commonly used for insulating walls, floors and roofs.
• Bulk Fibre: These loose and granulated insulation materials can be blown or poured into cavities. This form is often used in lofts and wall spaces.
• Rods & Bars: Solid insulating materials in a rod or bar shape, they are used for specific applications or as spacers to create a thermal break.

By Material

• Fibreglass: A common thermal insulator made of fine glass fibres, it is lightweight and fire-resistant.
• Mineral Wool: Made from molten rock or slag, mineral wool is highly fire-resistant and offers excellent acoustic properties.
• Cellulose: A bulk fibre and eco-friendly option often made from recycled paper
• Polystyrene: A lightweight, rigid foam material known for its excellent heat proofing properties.
• Silicate & Superwool: These are advanced high-temperature insulators designed to withstand extreme heat, making them perfect for industrial applications.

By Application/Rating

• High-Temperature Insulator: These insulators are designed for use in extreme heat environments, such as furnaces, kilns and high-pressure steam pipes.
• Fire-resistant: These materials are non-combustible and can prevent the spread of fire.
• Industrial grade: Engineered for heavy-duty use in industrial environments, offering high durability and performance.

How to Install Thermal Insulation

1. Assess the area to determine the appropriate type of thermal insulation sheet, board or fibre best suited to the purpose.
2. Ensure the surface is clean, dry, and free from debris before installation.
3. Cut the heat insulation sheet to the correct size using appropriate tools.
4. For pipe lagging, wrap thermal sheets tightly and secure with bands, tape or adhesives.
5. Install rigid boards with mechanical fixings or adhesive systems where required.
6. Always follow safety guidelines when handling fibrous or chemical-based thermal insulating materials.

How to Choose the Right Type of Thermal Insulation

• Application: Decide whether you need industrial thermal insulation for boilers, a thermal insulation sheet for electronics, or general building insulation.
• Temperature Rating: Select a high heat insulation product if operating in extreme conditions.
• Material: Choose fibreglass for affordability, mineral wool for fire resistance, or silicate for demanding high-temperature use.
• Form: Decide between flexible sheets, rigid boards or bulk fibre depending on coverage needs.
• Environment: Consider exposure to moisture, chemicals and outdoor conditions when selecting thermal insulation materials.
• Budget: Balance cost with performance, choosing the most suitable grade for your industry.

Buy Thermal Insulation Online from RS

RS is a leading thermal insulation manufacturer, supplier and distributor in Australia. Our extensive catalogue includes everything from cost-effective thermal sheets for general sealing to advanced industrial heat insulation. When you shop with us, you can find products from top brands that include Sindanyo H91, Fischer Elektronik as well as our very own RS Pro. We also stock acoustic insulation and glass fibre tape for various industrial applications.

With access to over 700,000 products, secure payment options and transparent pricing, RS provides reliable solutions with dependable delivery across Australia. For more information on delivery timelines and purchasing support, please visit our delivery page.