I've got a modular oven basically made from a number of precast firebrick pieces. (Call it a Spanish Econo model, not the high quality Forno Bravo ovens available from James
)
Anyway, I've noticed that some of the inside mortar is flaking where the formed blocks were put together (probably cracked during transport and/or placement) and I'm wondering about whether to smear some high heat mortar (Refrax?) over them or just not worry about it.
I'm particularly wondering if you would get good enough adhesion after the oven has already been in use? Maybe after a pizza night when all the soot has been burned off?
Anyone done something like this?
XJ