Camco’s TST Blue Enzyme RV Toilet Chemical contains a new bacterial or enzyme complex that will digest waste, tissue, fats and proteins and only activates in the presence of material requiring digestion. Unlike normal enzymes, this new chemistry provides a stable product with a long shelf-life that is not temperature sensitive. 4 ounces treats 40 gallons. It contains a buffer system to prevent acid formation as well as septic odors and has a Pure Rain fragrance. All components are biodegrable. 1 gallon bottle.