[RichH]

Paraformaldahyde is sold a "Mildew-Gasz", etc. BoatUS, West Marine, etc. Takes a long time for the gas to attentuate and kill the spores, etc. Crystals are used for long term storage - months.
Sodium Silicate based: Tuff-eNuff (Florida Manufacturer) ... go to a hardware store that specializes to the industrial trade and browse.... or a Janitorial supply. What strong caustics do is *dissolve* the mildew cells. If you dont remove the cells (even dead) other lifeforms will use the dead cells as nutrient sources. .... drycleaning will help (to remove mildew edible ''soil'') but if any of the material that is ''infected'' is celulose based - wood, cotton, etc. it will be a nutrient source for the mildew to re-infect (eat).