High Temperature Felts & Blankets


Visit the Data Center for Product Specifications, MSDS Sheets and more information.

Visit the Data Center for Product Specifications, MSDS Sheets and more information.


E Glass Felts & Blankets

Lewco E Glass Fabrics, Felts and Blankets are composed of 100% select-grade type “E” glass fibers needled together into blanket form. It is INCOMBUSTIBLE, ASBESTOS-FREE and contains NO RESINOUS OR INORGANIC BINDERS. Lewco Glass Mat can be used on equipment operating at temperatures to 1200°F and will not deteriorate or shake apart in vibrating applications. Conforms to Mil. Spec. Mil-I-16411,Mil-I-24244, ASTM E-84. Smoke -O, Flame -O NRC-1.36.

Silica Felts & Blankets

Lewco Silica Fabrics, Felts and Blankets insulation is manufactured using 98% pure textile grade silica fiber needled together into blanket/felt form. Lewco Sil blanket base fiber is made through a hot extrusion process yielding 6-11micron, nonrespirable fiber. This fiber is then processed to maximize thermal efficiency. Lewco Sil Mat is INCOMBUSTIBLE, ASBESTOS FREE, NON-RESPIRABLE, and contains no ORGANIC, or RESINOUS BINDERS. Typical applications include engine exhaust system insulation, hot industrial equipment insulation, and many others. Maximum continuous temperature – 1800°F.

Silica/Fiberglass Composite Felts & BlanketsLewco can combine our Silica and Fiberglass insulation felts into needled composites that for many insulation applications can give customers the pricing advantage of Fiberglass with the high temperature properties of Silica fiber. Lewco can combine these two different felts introvarious thickness combinations to meet customer requirements. These insulation felt and blanket composites are strong enough to give long life in tough, difficult applications. Applications include: Stress Relief blankets, Removable/Reusable Insulation for high noise level, high maintenance, high vibration and high temperature equipment or engine exhaust systems.

Ceramic Fiber Products/Blankets

Lewco Refractory Ceramic Fiber products have two temperature grades – 2300 °F and 2610 °F. Lewco Ceramic Fiber Products feature a broad family of products that include Bulk Fiber, Needle Felted Blanket, Paper andTextiles. The products are ideal for High Temperature furnaces, filtration, gasket applications, stress relieving and other refractory applications.


Thermal Conductivity (K-Factor)
BTU, in./ft2, HR. °F
Typical Properties
Lewco also offers a full line of ANSI FM 4950 Approved fabrics. Click here to view a PDF of our list of FM Approved fabrics.