Apr 14, 2015 · Doesn't have to be Inswool, Kaowool, or any particular brand or density. Yes, some options are better, ideally you want Inswool HZ or Kaowool's Cerachem blanket, or their equivalents, because they've got higher temp ratings, but for just forging, anything you can source locally is your best bet, assuming it's ceramic fiber with a sufficient ... Refractories West-Home Online e-commerce catalog for all refractory products only from Refractories West Inc. Purchase online sairset, greefpatch 421, satanite, inswool, kaowool, blue ram, and all other refractory products. If it is refractory chances are we will have it. Until now I have preferred a more portable arrangement for my first rocket stove, though I'm still not sure about the safety of such an idea, due to carbon monoxide (CO) concern. I'm curious if the kaowool (inswool) blanket is necessary, however; should I just go with a 3 wall of vermiculite & refractory?.