Fox James wrote:Hopefully Graham will test it out for us......
bob day wrote:I' just ordered some water glass to use as a rigidizer, then found out there are utube vids explaining how to make it from lye (drain unclogger ) and silica gel (I have lots of that already on hand.
If it helps at all, I just dismantled a heat riser which I used ceramic fiber (unrigidized) and the fibers still look very pristine after one season of use.
I use fire brick splits if there is wood abrading- especially for the floor and sides of the firebox, and especially if it is to be a permanent install., then perlite clay mix to hold it all together and give some extra insulation. I'll use the rigidized fiber blanket for the ceiling of the batch box.
doing some searches today I came up with this thread which talks about several other approaches. Which may give a harder face than simple rigidizer if you do plan to use it in the fire box https://www.iforgeiron.com/topic/37246-homemade-rigidizer/