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I am planning to install a woodstove very close to a concrete foundation wall, and I’m concerned about losing heat to the concrete. I do NOT plan to construct an insulating wall in the area adjacent to said stove to prevent such heat loss, but rather, have been considering that material that I see (sprayed, I assume) to steel re-inforced concrete beams, most notably in parking garages. It’s my understanding that the purpose of that material is to keep the re-bar cool in the event of a fire, thus preventing a lowering of its yield strength. I’ve always assumed that the stuff was non-flammable. Does anyone know anything about the R-value of this material, its method of application and a general cost estimate?

Thanx,
Brian