Its primary purposes are as an insulator (such as for rocket fuels) and acoustic damper. NASA engineered the product to have relatively low outgassing (a problem in vacuum and aboard spacecraft), desirable thermal and acoustic performance, as well as uniformity during distribution and application.
The main uses of this material are as a heat insulator, particularly for rocket fuel, and an acoustic dampener. NASA engineered it to be low-outgassing, have good thermal and acoustic properties, and be uniformly distributed and applied.