Exhibit 23.1
KPMG LLP
One Financial Plaza
755 Main Street
Hartford, CT 06103
Consent of Independent Registered Public Accounting Firm
We consent to the use of our report dated March 16, 2023, with respect to the consolidated financial statements of Aspen Aerogels, Inc., and the effectiveness of internal control over financial reporting, incorporated herein by reference, and to the reference to our firm under the heading “Experts” in the prospectus.
/s/ KPMG LLP
Hartford, Connecticut
March 16, 2023