Originally Posted By: Ian
The rock wool type is considered harmful and can cause cancers, in fact it is banned from use in Germany.


In the US it's known as asbestos. I'm pretty confident that it's illegal to use in the US as well.

EDIT: See below, I was way off base here.


Edited by chaosmagnet (08/13/14 12:59 PM)
Edit Reason: the veil of ignorance has been lifted