Cookie Notice


The website (the “Site”) and any smartphone software application (“Application”) are brought to you by Aspen Aerogels, Inc. (“Aspen,” “we,” “us,” or “our”).

Our Site and Application use cookies to distinguish you from other users of our Site and/or Application, and to collect information about your online preferences.   This helps us to provide you with a good experiences when you browse our Site or use our Application, and also allows us to help improve our Site and Application.

A cookie is a small file of letters and numbers that may be stored on your browser, your mobile device, or the hard drive of your computer, if you agree to allow these cookies to be placed.  Our cookie banner displays on your visit to our Site, or the download of our Application, and you may choose to accept cookies at that point.

Most internet browsers are automatically set up to accept cookies. However, you can block cookies by activating the setting on your browser that allows you to refuse the setting of all or some cookies. Please refer to the help and support area on your internet browser for instructions on how to block or delete cookies. However, if you use your browser settings to block all cookies (including functional cookies) you may not be able to access all or parts of our Site or use our Application.

Analytics/performance cookies. These are third-party cookies that collect information about how you use our Site and our Application.  They allow us to recognize and count visitors and to see how visitors move around our Site when they are using it.  They also allow us to improve our Site and our Application.  These cookies are placed by our analytics providers:  Google Analytics, Hubspot, Brave River Solutions, SoundCloud and Flipping Book Cloud.  Google/YouTube does not allow users to set cookie preferences. For general information on how to opt-out of analytics/performance cookies, you can visit the Digital Advertising Alliance’s Consumer Choice website at

Targeting cookies.  These cookies collect information about your browsing habits such as the pages you have visited and the links that you have followed.   We will use this information to make our Site and our Application more relevant to your interests.  They are also used to make advertising and marketing more relevant to you.  These cookies are placed by our third-party customer relationship partner, HubSpot.  For information on the cookies that HubSpot sets, please see here and see HubSpot’s Cookie Policy here.

We use the following cookies:

__hs_opt_out This cookie is used by the opt-in privacy policy to remember not to ask the visitor to accept cookies again. This cookie is set when you give visitors the choice to opt out of cookies.  (Expires: 13 months)

__hs_do_not_track This cookie can be set to prevent the tracking code from sending any information to HubSpot. Setting this cookie is different from opting out of cookies, which still allows anonymized information to be sent to HubSpot. (Expires: 13 months)

hs_ab_test This cookie is used to consistently serve visitors the same version of an A/B test page that they’ve seen before. (Expires: Session cookie)

<id>_key When visiting a password-protected page, this cookie is set so future visits to the page from the same browser do not require login. The cookie name is unique for each password-protected page.

hs-messages-is-open (TTL 30 minutes) This cookie is used on the visitor UI side so HubSpot can determine/save whether the chat widget is open for future visits. It resets after 30 minutes to re-close the widget after 30 minutes of inactivity

hs-messages-hide-welcome-message (TTL 1 day)  

When you dismiss the welcome message in your messages tool, a cookie is set to prevent it from appearing again for one day.

hs_langswitcher_choice This cookie is used to save the visitor’s selected language choice when viewing pages in multiple languages. It gets set when an end user selects a language from the language switcher and is used as a language preference to redirect them to sites in their chosen language in the future, if they are available. (Expires: 2 years) 

Analytics Cookies
These are non-essential cookies controlled by the cookie banner. If you’re a visitor to a site supported by HubSpot, you can opt out of these cookies by not giving consent.

__hstc The main cookie for tracking visitors. It contains the domain, utk (see below), initial timestamp (first visit), last timestamp (last visit), current timestamp (this visit), and session number (increments for each subsequent session). (Expires: 13 months) 

Hubspotutk This cookie is used for to keep track of a visitor’s identity. This cookie is passed to HubSpot on form submission and used when de-duplicating contacts.(Expires: 13 months) 

__hssc This cookie keeps track of sessions. This is used to determine if we should increment the session number and timestamps in the __hstc cookie. It contains the domain, viewCount (increments each pageView in a session), and session start timestamp. (Expires: 30 min) 

__hssrc Whenever HubSpot changes the session cookie, this cookie is also set. We set it to 1 and use it to determine if the visitor has restarted their browser. If this cookie does not exist when we manage cookies, we assume it is a new session. (Expires: End of session) 

Functional cookies
These cookies remember choices you make and are used to recognize you when you return to our Site or open the Application.  This enables us to personalize content for you and remember your preferences (for example, your choice of language),   You may choose to disable these cookies, but by doing so, some functionality of the Site or the Application may not be available to you.

messagesUtk This cookie is used to recognize visitors who chat with you via the messages tool. If the visitor leaves your site before they’re added as a contact, they will have this cookie associated with their browser. If you have a history of chatting with a visitor and they return to your site later in the same cookied browser, the messages tool will load your conversation history with that visitor. (Expires: 13 months) 


We use Hotjar in order to better understand our users’ needs and to optimize this service and experience. Hotjar is a technology service that helps us better understand our users’ experience (e.g. how much time they spend on which pages, which links they choose to click, what users do and don’t like, etc.) and this enables us to build and maintain our service with user feedback. Hotjar uses cookies and other technologies to collect data on our users’ behavior and their devices. This includes a device’s IP address (processed during your session and stored in a de-identified form), device screen size, device type (unique device identifiers), browser information, geographic location (country only), and the preferred language used to display our website. Hotjar stores this information on our behalf in a pseudonymized user profile. Hotjar is contractually forbidden to sell any of the data collected on our behalf.

For further details, please see the ‘about Hotjar’ section of Hotjar’s support site.

Google Analytics

_ga Used to distinguish users. (Expiration: 2 years)

_gid Used to distinguish users. (Expiration: 24 hours)

1P_Jar Based on recent searches and previous interactions, custom ads are shown on Google sites. (Expiration: 1 week)

ANID Lists ads on Google sites based on recent searches. (Persistent)

NID Stores visitors’ preferences and personalizes ads on Google websites based on recent searches and interactions. (Expiration: 6 months)

__Secure-3PAPISID Builds a profile of website visitor interests to show relevant and personalized ads through retargeting. (Expiration: 2 years)

__Secure-3PSID Builds a profile of website visitor interests to show relevant and personalized ads through retargeting. (Expiration: 2 Years)


UserMatchHistory: LinkedIn Ads ID syncing (Expiration: 30 days)

_guid: Used to identify a LinkedIn Member for advertising through Google Ads (Expiration: 90 days)

Bcookie: Browser Identifier cookie to uniquely identify devices accessing LinkedIn to detect abuse on the platform (Expiration: 2 years)

Lang: Used to remember a user’s language setting (Expiration: Session)

li_oatml: Used to identify LinkedIn Members off LinkedIn for advertising and analytics outside the Designated Countries and, for a limited time, advertising in the Designated Countries (Expiration: 30 days)

li_sugr: Used to make a probabilistic match of a user’s identity outside the Designated Countries (Expiration: 90 days)

liap: Used by to denote the logged in status of a member (Expiration: 1 year)

lidc: To optimize data center selection (Expiration: 24 hours)

lissc: Used to ensure there is correct SameSite attribute for all cookies in that browser (Expiration: 365 days)

For more information on managing cookies, please go to, or visit, which has further information about behavioral advertising and online privacy.


Our Site may contain links to other websites. The fact that we link to a website is not an endorsement, authorization or representation of our affiliation with that third party. We do not exercise control over third-party websites. These other websites may place their own cookies or other files on your computer, collect data or solicit personal information from you. Other sites follow different rules regarding the use or disclosure of the personal information you submit to them. We encourage you to read the privacy policies or statements of the other websites you visit. Please be aware that the terms of our Privacy Policy do not apply to these third-party websites.


If you have any questions about our Privacy Policy, please contact us by one of the following options:

  • By e-mail:
  • By phone: 1-888-481-5058 or 1-508-691-1111
  • By mail: Aspen Aerogels, Inc., 30 Forbes Road, Building B, Northborough, MA 01532 United States.

This Cookie Notice was last updated on November 6, 2020.