I am ill, and I may not be making sense. The Pyrocat MC has no sulfite or bisulfite. The water solution is quite different from the glycol solution. Sulfite reduces the proportionality of the stain. You should search for Sandy King's posts about Pyrocat MC. I don't know why propylene gloycol should not be available in Australia. It is used in cosmetics, medicines for humans and other animals, as well as in safe antifreeze.