Microlite® B Blanket



Microlite® B Blanket is a lightweight, flexible, insulation material. This blanket is formed from flame attenuated borosilicate glass fibers and bonded with a thermosetting phenolic resin binder to provide the blanket with strong dimensional stability.


Microlite® B Blanket is designed for applications in which good thermal and acoustical properties are required and where temperatures are not in excess of 450°F (232°C). It is ideally suited for use in aircraft and other equipment applications where the higher performance characteristics of Microlite® AA are not required.


Microlite® B Blanket is light in weight, excellent sound absorbing properties, and does not deteriorate with age. The non-cellular and non-hygroscopic glass fibers will not support mold, mildew, fungus, or vermin. The exceptional resiliency of the glass fibers prevents vibrational settling.


Flexible Blanket

Temperature Limit

450°F (232°C)

Available Forms

Microlite® B Blankets are available in a variety of densities, weights, thicknesses, roll lengths, and widths. The standard roll width is 36” and 72” and standard roll length of 100’.


  • Aircraft
  • Equipment


  • High sound Absorption
  • Flame Resistance
  • Low Heat Transfer
  • Good Handleability

View the complete Microlite® B Data Sheet

View the Microlite® B Safety Data Sheet

All information provided is © Johns Manville.