Greg Karas · 4 months ago
Thanks for the pic and getting back to me. (A picture speaks a thousand words)
Well... I'm planning to use perlite and ? (still deciding on mortar). I found a source nearby that sells "HeatStop" for $70 which I haven't yet researched the product.
Ideally what I'm trying to achieve with minimal investment (cough) is using a cement/mortar type of drymix to that which I'll mix in perlite, then add water and apply to the oven.
Also, for the bricked arch opening I was thinking using the same cement or mortar mix between the bricks but this time without perlite.
I already bought a 25 lb tub of Rutland castable refractory cement which as I mentioned in my initial comment gave me a heck of a time.
I also have a tub of Hercules furnace cement which I read that I can use that for in between the bricks on the arch and to make it stable I'm to add sand in various ratios depending on the thickness.