is an airborn particle from the main source that when inhaled causes problems so they say.
Letting it lay as it is could be ok, but covering it would be better. Removing it could be a very expensive and major job for you.
In my opinion only, I would consider covering it when time comes or have the now owners do this as a contigency of the sale.
Out of all politness and respect, the word does not have a "p" in it. Its asbestos. You might want to know this in your dealings.
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