Other experts will weigh in, but my thoughts. PV is essentially plastic. It's not as bad as say acrylic... but still not what I would call flame-retardant.

That said, there was a video in one thread on here that burned various different kilting materials. I believe PV was amongst the ones test, but couldn't tell you how it faired. I remember acrylic went up dramatically, and wool wouldn't really burn at all. PV I think was somewhere in the middle.

Does anyone have a link to that page?