This specification covers the standard for the composition and physical properties of expanded perlite loose fill insulation. This specification also covers the testing procedures used in determining the acceptability of the materials which deal primarily with material performance in the temperature range associated with the thermal envelope of buildings. This specification also covers the standard for surface-treated perlite proposed for use in dust suppression. Requirements for the insulation shall include conformance to standard of the following: bulk density, grading, thermal resistance, moisture absorption, combustibility, surface burning characteristics, and dust suppression. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.