AURO emulsion has excellent microporous characteristics letting walls breathe naturally. It contains no fungicide or chemical preservative. The 321 is our general purpose domestic emulsion which dries to a matt finish and can be wiped clean. The 322 has extra titanium dioxide in it which makes it much sturdier and is great for public buildings, schools and other high traffic areas, this matt finish is long lasting and scrubbable. Auro 751 is a powdered casein paint, just add water for an economical and easy to use interior paint with a soft matt finish.