Erik Johanson

Ok please forgive me but is a refractory core the same as a cast clay peri lite mixture. I thought they were one in the same. I was planning on casting my core with a mixture of refractory clay, perilite, and Portland cement or rutlands refractory furnace cement. Thanks again

Thanks for the good advice. Fiberglass it is then! I was referring to coating the outside surface, I would assume it would remain cool enough to handle a coat of something. What do you think? Thank you

I wish I could give better advice but I'm still trying to figure it out myself. I did however have a question about what fivers could be added to my perilous mixture instead of shredded fiberglass? Also what could I coat the finished burn chamber casting to help protect the surface. I guess it would be the same as protecting a Cobb bench. Thanks

Thanks for all the replays you are all more helpful than I expected especially since this is the first forum I've belonged too. I hope I can be as helpful in the future once i get the hang of this. You are correct regarding the clay its $$$. I'm sure with all the good advice and resources I will come up with a good mix and will share what I've found works

Interesting about the shape of the riser, goes to show how much I still need to learn. And yes my names spelled correctly, or at least the old way lol.

I have been trying to find a suitable material to form my own burn chamber and heat riser. I came across a product called castable refractory clay. Basically you can form your own firebrick in any shape. My idea was to use a rigid cardboard tube to construct the j-tube then use the refractory clay to make a mold then burn out the cardboard. I would love to hear any and all comments on this idea. Thanks