Silica aerogels
Aerogels are among the lightest solids ever made. A silica aerogel is about 97% air, held in a fine, lacy network of silica, which makes it an exceptional insulator for its thickness.
Aspen Aerogels annual report (10-K), 2025How far from your life: You can get it now, though it may not be common yet.
Company-reportedFrom lab to your life
Why it’s on step 4
- 1Lab discovery
- 2Working prototype
- 3Real-world testing
- 4Approved or on sale
- 5Everyday life
The rule
A regulator approved or cleared it where approval applies (the FDA, the EMA, a CE mark), or it is sold to the public or to customers beyond a trial.
- Aspen Aerogels sold $168.9 million of its PyroThin battery heat barriers in 2025, down from $306.8 million in 2024, mostly to GM. Aspen Aerogels annual report (10-K), 2025
The short version
What you need to know
- Is it really nano?
Truly nano
What insulates is the structure: a solid that is mostly air, held in a very fine silica network.
Aspen Aerogels annual report (10-K), 2025- Where you’ll find it
As thin heat barriers between the cells of electric car batteries made for GM, Toyota and ACC, and as industrial insulation.
Aspen Aerogels annual report (10-K), 2025- Who’s behind it
Aspen Aerogels and others
On the record
Every step, dated
Newest first. Company-reported means the only source so far is the company itself.
- On saleCompany-reported
Aspen Aerogels sold $168.9 million of its PyroThin battery heat barriers in 2025, down from $306.8 million in 2024, mostly to GM.
Aspen Aerogels annual report (10-K), 2025
Who makes it
The companies
- ASPNNYSEAspen AerogelsPure play
Makes aerogel insulation, including thin heat barriers for electric car batteries supplied to GM, Toyota and ACC.
We track:Aerogels
Sources
Where every line comes from
Each source with the passage, word for word, that backs what we wrote.
- Aspen Aerogels annual report (10-K), 2025
Silica aerogels are highly porous structures in which 97% of the volume consists of air trapped between
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