High Temperature Insulation
High Temperature Insulation Solutions in South Africa
High temperature insulation is critical in industrial environments where extreme heat must be contained and managed. Whether you’re running furnaces, kilns, boilers, or other high-heat equipment, choosing the right insulation improves energy efficiency, protects equipment, and ensures safe working conditions.
At Insulation Warehouse, we supply high-performance stone wool insulation products that are well suited for demanding high-temperature applications in South Africa.
What is High Temperature Insulation?
High temperature insulation refers to materials designed to perform in environments where temperatures regularly exceed 250°C, and often reach 600°C to 750°C or higher. Unlike standard building insulation, high temperature insulation must maintain its structure and performance under continuous heat exposure without degrading.
Insulation for High Temperature Applications
High temperature insulation is manufactured from materials that can withstand extreme heat while maintaining thermal performance and structural integrity.
These products are non-combustible and can typically withstand continuous temperatures of up to 750°C, making them a popular choice for:
- Industrial furnaces
- Ceramic and brick kilns (typically as backup insulation)
- Boilers and heat exchangers
- High-temperature ducting and piping
- Incinerators and heat treatment equipment
Furnace Insulation
Furnaces operate at high temperatures and require insulation that can handle thermal stress while reducing heat loss. Rockfibre boards and wired mats are commonly used as **backup insulation** behind refractory materials in furnace walls, roofs, and doors.
Higher density products (120kg and 160kg) are generally preferred because they offer better structural integrity. For furnaces operating continuously above 650°C, Rockfibre should be installed as backup insulation rather than as the primary hot-face lining.
Kiln Insulation
Kilns used in ceramics, brick manufacturing, and industrial processes require insulation that maintains stable internal temperatures and reduces energy consumption. Rockfibre boards and wired mats are suitable for kiln insulation where operating temperatures do not exceed approximately 650°C.
Wired mats are often preferred for curved surfaces and complex kiln designs, while rigid boards work well for flat walls and floors. In higher temperature kilns (above 850–900°C), Rockfibre is typically used as **backup insulation** behind primary refractory linings.
Boiler Insulation
Boilers and heat exchangers operate under continuous high temperatures and pressure. Proper insulation is essential to reduce heat loss, improve energy efficiency, and protect surrounding equipment and personnel.
Flexible insulation materials are particularly well suited for boiler applications because they can be wrapped around pipes, drums, and irregular surfaces. Higher density rigid boards are also used for flat boiler walls and casings.
Benefits of High Temperature Insulation
Fire Resistance
High temperature insulation materials are non-combustible and do not contribute to fire spread. They can withstand extremely high temperatures without melting or releasing harmful gases.
Thermal Performance
These materials provide excellent thermal resistance, helping to reduce heat loss and maintain consistent temperatures inside furnaces, kilns, and boilers. This leads to lower energy costs and improved process efficiency.
Acoustic Performance
In addition to thermal benefits, many high temperature insulation materials also offer good sound absorption, which can help reduce noise in industrial environments.
Durability
Quality high temperature insulation maintains its shape and performance over time. It resists sagging, moisture, and degradation, even in demanding conditions.
Recommended Products for High Temperature Use
For high temperature applications, we generally recommend the following products:
Insulation Boards (Rigid)
Best for flat surfaces such as furnace walls, kiln linings, and partitions (used as backup insulation depending on temperature).
- Higher densities (100kg, 120kg, and 160kg) are preferred for high-heat environments.
Insulation Wired Mats (Flexible)
- Ideal for wrapping pipes, ducts, and curved surfaces.
- Excellent for irregular shapes in high-temperature industrial equipment.
Common Applications for High Temperature Insulation
Rockfibre is widely used in the following high-temperature applications:
- Industrial furnaces and ovens
- Ceramic, pottery, and brick kilns
- Boiler and steam system insulation
- High-temperature exhaust and flue systems
- Heat treatment and annealing equipment
- Incinerators and thermal oxidizers
Why Choose High Temperature Insulation from Insulation Warehouse?
We supply a range of high-performance insulation products suitable for high-temperature applications in South Africa.
Our products are:
- Non-combustible and fire-safe
- Capable of withstanding continuous high temperatures
- Available in both rigid boards and flexible wired mats
- Suitable for both new installations and maintenance projects
Browse High Temperature Insulation Products
Explore our full range of Rockfibre boards and wired mats suitable for high temperature applications:
- 60kg Rockfibre Boards
- 80kg Rockfibre Boards
- 100kg Rockfibre Boards
- 120kg Rockfibre Boards
- 160kg Rockfibre Boards
Need Help Choosing the Right High Temperature Insulation?
Our team can help you select the correct density and thickness for your specific furnace, kiln, or industrial application. Contact us today for expert advice and a competitive quote.
Where to Go Next
- Explore stone wool insulation
- Explore mineral wool insulation
- View fire-rated insulation
- Browse insulation by application