Gallon, armor mold remover & disinfectant, 1 step formula kills 99. 9percent of household bacteria & viruses, destroys odors & inhibits the growth of mold & mildew, EPA registered, effective way to clean up after storms, floods & sewer backup, also effective against odor caused by smoke, household & institutional uses, cleaner, Sanitizer, fungicide, mildew St at & virucide.