Insulfrax® S Blanket

Alkaline Earth Silicate (AES)- low bio-persistence fibers (LBP). Temperature Grade:  1200°C (2192°F).

Insulfrax® S Blanket was developed from a calcium, magnesium, silicate chemistry to provide thermal insulation at continuous operating temperatures up to 1100°C (2012°F) . It meets European regulatory requirement (Directive 97/69/EC). Insulfrax® S fiber chemistry has been combined with Unifrax’s proprietary fiber spinning technology to create a specialty high-temperature blanket with superior thermal and mechanical properties.

Insulfrax® S Blanket is a flexible, strong, lightweight, needled blanket produced from Insulfrax® Fiber. Mechanical needling of the spun Insulfrax® fibers eliminates the need for binders in the product’s manufacture and results in a product with high tensile strength. Since Insulfrax® S Blanket is completely inorganic, the product exhibits no smoke generation or outgassing in service. Insulfrax® S Blanket combines low thermal conductivity with excellent resistance to thermal shock. Note that high humidity and wetting with water prior to service has little effect on Insulfrax® S Blanket.

Insulfrax® S Blanket is used in a wide range of applications including refractory linings, thermal insulation, appliances, and molten metals transfer.


Refer to the product Safety Data Sheet (SDS) for recommended work practices and other product safety information.

For additional information on products, properties and performance, typical applications, or to identify the recommended product for your application, see the product information sheet listed above or contact the Unifrax Application Engineering Department at +91 22 2921 2200.