The Benefits of Ceramic Fiber Board Insulation

Aug 1, 2023

Ceramic fiber board is a rigid, lightweight board made from spun ceramic fiber material. It offers highly effective thermal insulation and protection for extreme temperature applications up to 2300°F. Ceramic fiber board is produced in a variety of densities, strengths, and temperature grades to suit particular insulating needs. It is commonly referred to as ceramic fiber board insulation or ceramic fiber insulation board.

Ceramic fiber board insulation has several properties that make it a versatile, high performance insulation option where traditional materials fall short.

insulation ceramic fiber board

Temperature Resistance

The extremely high melting point of ceramic fibers allows ceramic fiber board insulation to handle much higher temperatures than traditional insulations like fiberglass. While fiberglass insulation softens at 1000-1200°F, ceramic fiber board remains rigid up to its maximum temperature limit. This allows reliable protection for furnace linings, boilers, kilns, ovens and other processes operating above 2000°F. The rigid board form provides additional structure and containment compared to insulation blankets or ropes.

Low Thermal Conductivity

Ceramic fiber board combines low density with very low thermal conductivity. Thermal conductivity indicates the ability of a material to transfer heat. The extremely low thermal conductivity of ceramic fiber minimizes heat flow through the insulation. This helps improve efficiency by retaining more heat in the system.

For example, a one inch thickness of ceramic fiber board provides approximately the same insulation value as six inches of refractory brick. By using less material, ceramic fiber board reduces insulation cost and weight. The thinner profile also saves space compared to traditional dense insulation materials.

Resistance to Thermal Shock

The low density and heat storage of ceramic fiber board insulation helps resist damage from thermal shock. Rapid temperature changes can cause catastrophic failure in traditional monolithic refractory linings. Ceramic fiber board is better able to absorb these fluctuations due to its fibrous structure and low conductivity. This improves durability and resistance to cracking from thermal cycling.

Fire Protection

Ceramic fiber board provides an added layer of passive fire protection. Its resistance to extreme temperatures contains fires and prevents spread to surrounding equipment. Ceramic fiber board does not promote flame spread, produce smoke, or contribute fuel to fires. This added protection improves safety and helps avoid costly damage.

Customizable Shapes And Sizes

Ceramic fiber board insulation is produced in broad squares and rectangles that can be cut to achieve virtually any required shape. Complex geometries, holes, and curved sections can be fabricated on site for a custom fit. The rigid board holds its shape when properly secured. Multiple pieces can be joined to cover large or irregular surfaces.

Ease of Installation

Ceramic fiber board mounts quickly using simple hardware and anchors. A snug fit helps minimize heat loss through gaps. On cold systems, aluminum foil facing improves insulation performance and facilitates installation. Ceramic fiber board’s light weight compared to denser refractory linings also helps make installation faster. The rigid board design speeds up maintenance and reinstallation after servicing.


Ceramic fiber board insulation withstands continuous use in any position – vertical, horizontal, or compressive load. It performs equally well in oxidizing, reducing, and vacuum environments. The broad operating temperature range suits various process conditions. Ceramic fiber board insulation is unaffected by most chemicals and water, maintaining its integrity in harsh industrial environments. These qualities make it versatile across many demanding applications.

Typical Applications About Ceramic Fiber Board Insulation:

  • Furnace, kiln, and oven linings
  • Boiler insulation
  • Chimney liners
  • Gas turbine insulation
  • Duct and chimney insulation
  • Process heater linings
  • Incinerators
  • Annealing covers

Ceramic fiber board insulation provides a combination of high temperature resilience, low thermal conductivity, and customizability that solves insulation challenges in extreme temperature applications. As an advanced engineered insulation, ceramic fiber board improves efficiency, safety, and performance where traditional materials fall short.