Fire brick replacement?

I encountered a video by NightHawkInLight on YouTube not so long ago, where he demonstrates a very cheap and readily available material, which he demonstrates as being incredibly insulative called StarLite.


and


I was wondering if anyone else had seen it, and had tried using it in a rocket stove/rocket mass heater?

Hi Andrew;
I can't remember why, but this product has been experimented with for Rocket stoves and was dismissed as not effective.
I believe it had to do with longevity.  

In a J tube or a Batchbox.
Firebrick, insulated above 2500F.
Or heavy firebrick also rated to 2500F and above.
Combined with RA330 steel as a roof and Morgan superwool as an insulator, creates a long term Rocket engine that will last years.

thomas rubino wrote:Hi Andrew;
I can't remember why, but this product has been experimented with for Rocket stoves and was dismissed as not effective.
I believe it had to do with longevity.  

In a J tube or a Batchbox.
Firebrick, insulated above 2500F.
Or heavy firebrick also rated to 2500F and above.
Combined with RA330 steel as a roof and Morgan superwool as an insulator, creates a long term Rocket engine that will last years.

That's what I thought would probably be the response, but it's nice to see people experimenting with other (and cheap) materials.

I think he refers to this material as ablative. I didn't know what it meant, but when he described it, I got the impression that the heat doesn't pass through because it's used up in slowly destroying the material. I think eventually it's all ash and becomes much less insulative.