greasemonkeymann
Well-Known Member
I think it contains a carcinogen, like most natural rocks, but I don't think it has asbestos. Don't KNOW that for a fact, but it's just puffed volcanic rock? Right?I haven't. I considered it and was told that it *may* contain asbestos so I took a pass. Not sure if the garden grade is any different though???
http://www2.epa.gov/asbestos/protect-your-family-asbestos-contaminated-vermiculite-insulation
Maybe the insulation stuff has a flame retardant added?