Power of Attorney for Glenn Deegan at Aspen Aerogels, Inc.

The filing is a Power of Attorney document for Glenn Deegan, the Chief Administrative Officer, General Counsel, and Corporate Secretary of Aspen Aerogels, Inc. The document appoints Andrew Lauzon, Senior Director of Total Rewards at the company, as Deegan's attorney-in-fact. This appointment grants Lauzon the authority to execute and file Forms 3, 4, and 5 on behalf of Deegan in accordance with Section 16(a) of the Securities Exchange Act of 1934. The Power of Attorney also allows Lauzon to perform any necessary actions related to these filings, including authentication documents for EDGAR Filing Access. The document remains in effect until Deegan is no longer required to file these forms, unless revoked earlier by Deegan.