Johns Manville Microlite® B Unbonded is a lightweight, binderless insulating blanket designed for applications in which intermittent temperatures may reach as high as 1000°F (538°C). Because of its binderless construction, Microlite B Unbonded eliminates outgassing or binder vaporization in such applications as cold face insulation in thermal fabrications for aircraft engines or thermal insulation in solar collectors. Microlite B Unbonded provides excellent thermal and acoustic performance and withstands temperatures up to 1000°F (538°C) for short-term exposure and up to 850°F (454°C) for continuous exposure.