Johns Manville Microlite® AA Uncured insulation is manufactured using flame-attenuated borosilicate glass fibers bonded with an uncured thermosetting resin and provides superior thermal and acoustic performance. It can be molded into a wide range of sizes, shapes, densities and thicknesses to fit odd-shaped parts, special configurations and applications in which precise insulation fit is critical. After proper curing, the molded or sized insulation material is excellent for aerospace or high temperature equipment applications where space and weight are key considerations.