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Foam glass insulation, also known as cellular glass insulation, is a type of thermal insulation material used to reduce heat transfer in buildings and industrial applications. It is composed of crushed glass mixed with a foaming agent, which is heated to create a cellular structure of tiny, sealed glass bubbles. This cellular structure gives foam glass insulation its insulating properties and makes it an excellent choice for various insulation needs. Here are some key characteristics and benefits of foam glass insulation:


Thermal Insulation: Foam glass insulation has a high R-value, which measures its thermal resistance. It is effective at reducing heat transfer, making it suitable for both hot and cold applications. It helps maintain a consistent temperature inside a building and reduces energy consumption for heating or cooling.


Fire Resistance: Foam glass insulation is non-combustible and can withstand high temperatures without releasing toxic fumes or contributing to the spread of fire. This makes it a safe choice for fire-prone areas and industrial settings.


Moisture Resistance: Foam glass insulation is inherently resistant to moisture and does not absorb water. It retains its insulating properties even in damp conditions, which helps prevent mold and mildew growth.


Chemical Resistance: It is resistant to most chemicals and does not corrode or degrade when exposed to corrosive substances. This makes it suitable for industrial applications where exposure to chemicals is a concern.


Durability: Foam glass insulation is a durable material that can last for decades without significant degradation, ensuring long-term insulation performance.


Environmental Friendliness: It is an eco-friendly insulation option because it is made from recycled glass and does not contain harmful chemicals or substances. Additionally, its long lifespan reduces the need for replacement and disposal.


Pest Resistance: Foam glass insulation is not attractive to pests like rodents or insects, which can be a concern with other insulation materials.


Low Maintenance: Once installed, foam glass insulation requires minimal maintenance, making it a cost-effective choice over time.


Foam glass insulation comes in various forms, including rigid boards, loose-fill granules, and pipe insulation. It is commonly used in applications such as insulating roofs, walls, floors, and pipes in residential, commercial, and industrial buildings. Its excellent thermal properties and resistance to moisture and fire make it a versatile and reliable choice for many insulation needs.



Cellular Glass is a kind of new inorganic insulation material with glass as the main raw material, mixed with appropriate amount of foaming agent, foamed by high temperature tunnel kiln, and then processed by annealing and cooling treatment. It has uniform independent closed pore structure. It completely retains the chemical stability of inorganic glass, has low density, low thermal conductivity, no moisture permeability, no water absorption, no combustion, no mildew, no rat biting, high mechanical strength, easy to process and resistant to all chemical attack except hydrofluoric acid. It contains no ozone depleting propellants, flame resistant additives or binders, without VOC or other volatile substances. It can be applied for pipe and equipment insulation, as well as tank bottom support and thermal isolation.


Foam Cellular Glass Distinctive Advantages:

Low density, low thermal conductivity but high compressive strength.

No water absorption, no permeability.

Low thermal expansion coefficient, good dimensional stability, no deformation, no crack.

Fire resistant, incombustible, and corrosion resistant.

No mildew, no rat biting, and preventing insect pests or microorganisms.

Applicable for cryogenic, constant, and high temperature.

Convenient for fabrication and installation.

No aging, no deterioration.

Environmentally friendly and recyclable.

Excellent acoustical coefficient.


Technical Specifications ASTM of Cellular Foam Glass Insulation

Technical Properties




Service Temperature, ºC

-268 to 480

-268 to 480


Density, kg/m³




Thermal Conductivity, W/(m·K)




Compressive Strength, Mpa




Flexural Strength, Mpa




Water Vapor Permeability, ng/(




Water Absorption by Vol %





Class A

Class A


Foam Glass | Cellular Foam Glass Insulation

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