Stop mold, mildew and bacteria naturally. Kanberra Gel is a natural product that degrades mold, fungus and bacteria in your RV, especially during storage. One 2 ounce container of Kanberra Gel is enough for a fifth wheel or travel trailer; or 2 cans for your Class A unit. The 4 oz jar is perfect for your Class B & C. Remove the lid and place the container on the floor; last for up to three months during storage.