Foam glass

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Notion

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Science and technology

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What Wikipedia says

Foam glass or expanded glass is a porous glass foam material. It is used as a lightweight, moisture- and fireproof building material with thermal and acoustic insulating properties.

Excerpt from the Wikipedia article “Foam glass”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Original uploader was Radomil at pl.wikipedia, CC BY-SA 3.0, via Wikimedia Commons.