And "Armor shield" doesn't have paper on either side, and therefore doesn't provide a food source for mold?
I'm wondering whether or not drilling small holes into the wall cavities between studs and blowing Borax dust into those wall cavities wouldn't be effective against the dreaded "Florida interior wall mold" we've all read so much about.
Boron is as effective a fungicide as copper or zinc, but less effective than arsenic as a biocide against a wide spectrum of fungii. But, unlike copper, zinc and arsenic, boron isn't toxic to mammals, and so it poses little to no health risk to people and most of their pets.
(We humans can almost eat boron and it's many compounds for breakfast without concern about how it'll affect our health. But boron and borates are highly poisonous to a wide variety of fungi, including the fungi that we call "bathroom mildew" mold and the dreaded "wood rot fungus", Serpula Lacrymans.
I expect it would be equally poisonous to the fungi that fall under the general heading called "toxic mold" that's so prevalent in America.
Log homes and very many of the wooden telephone poles in the United States are protected from the wood rot fungus (called "Serpula Lacrymans") by solid rods made from a chemical called "disodium octoborate tetrahydrate", which otherwise goes by it's commercial name as "Cobra rods" or "Impel rods". These rods look like they're made of glass, but they dissolve rapidly in water.
These rods are inserted into holes drilled into the logs of log homes or into telephone poles just above the water line. If the wood the logs or poles are made of gets wet, then the Cobra or Impel rods dissolve in that water, thereby releasing disodium octoborate tetrahydrate into the wood. Since this chemical is highly soluble in water, it migrates throughout the wet wood easily, thereby protecting the entire cross section of the log from any sort of fungal attack, including wood rot. Borates are the only chemicals that migrate throughout the entire cross section of the wood to protect the entire log from fungal attack. Other wood preservatives merely cling to the surface of the wood or are absorbed into the wood at it's surface, but don't diffuse through the wood to protect it's entire cross section like borates do.
The only reason why borates aren't used universally to protect wood from from rot is because all of the boron oxides (borates) are all highly soluble in water. So, liquid wood preservatives like Borocol and solid wood preservatives like Impel and Cobra rods will dissolve and wash away when the damage to the wood is caused by rainfall or running water. Rain fall and running water will wash away the boron based chemicals and leave the wood unprotected against attack by fungii.
But, boron based chemicals seem to be universally poisonous to a wide variety of fungii, but pose little to no harm to mammals.
I'm thinking that "dusting" the wall cavities of stud walls with Borax (the stuff you buy in a grocery store in the laundry section) would be pretty effective at killing any sort of mold or fungus that might want to feed on the damp paper on the drywall in that wall cavity.
Rio Tinto Borax : Home
Borates, Impel Rods, Cobra Rods, for natural pest control and rot protection in Log, Timber and Wood homes
That is, I'm thinking that if the dreaded Florida "toxic mold" belongs to the "fungii" family of ugly looking things, then it'd be "killable" with a boron based powder like ordinary Borax; (the stuff people use for their laundry).
That's because other boron based chemicals like Boracol and Impel rods are highly effective against the wood rot fungus and work well to protect wood from rotting. I have 6 to 8 Impel rods in each of the bottom corners of the fir window frames in my building. People sometimes ask what the "caps" on the window frames in my building are all about, and it gives me the opportunity to explain how the Impel rods under those plastic caps work, if and when the window frame wood were to ever get wet.
Borate based wood preservatives and mold fungicides have been used in Europe for many years but are only now becoming popular in North America.
That's mostly because they're both effective and "green". The wood preservatives we've used in North America till now have been effective, but not very "green".