The landlord said that "it's plastic stock, left from renovation on windows" from another apartment. It doesn't look like plastic to me, but then again I don't know much (very little actually) about construction materials. If it's asbestos can it be harmful just by passing by it while breathing in?

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    Even if it is asbestos (it doesn't look like it to me...) you can't be harmed "just by passing by it while breathing in" unless it is in a friable state (i.e. in a state where loose fibers can become airborne). It does not look to be in that state, it seems stable. Sep 14, 2019 at 20:45
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    Given that this appears to be new construction materials (as you were told, but also, not looking decades old) odds are about zero it would be/contain asbestos.
    – Ecnerwal
    Sep 14, 2019 at 22:17
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    Asbestos is nasty. Aside from give anyone who looks at it cross-eyed cancer, it can seduce your girlfriend, run up your credit cards, get your Xbox account banned, crank call your ex, drink all your beer, and send hokey memes to all your email contacts. Seriously, though, it's asbestos, not dioxin. And it's not even asbestos. Sep 14, 2019 at 23:09
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    @Harper, it is not anywhere as dangerous as dihydrogen monoxide ... that stuff is everywhere and if you inhale some of it, it can kill you
    – jsotola
    Sep 15, 2019 at 3:04
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    @Harper yah, that was funny (kinda), but see I grew up in a country where asbestos was a big no-no and even today it makes the news if it's found in school buildings and public edifices. Now I live in another country where there's little if any concern about such things. Personally, I rather be unjustifiably worried than caught by surprise.
    – flaneur
    Sep 16, 2019 at 10:12

3 Answers 3


I would 99+% guarantee it is urethane foam . One of the raw material components is cyanide if you want to worry.


Not to worry.... it's not asbestos. Fiberboard.


That is rigid insulation it is not asbestos.

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