Storage Deodorant for RV Holding Tanks - 8 oz 3-Pack - Thetford 32900 [VERSATILITY]: Thetford's Storage Deodorant works in every RV holding tank or portable waste tank [FUNCTIONALITY]: Formaldehyde-free deodorant, it lubricates the seals, protecting them during storage [UTILITY]: Controls odors in portable waste tanks and stored RV holding tanks for up to six months [CONVENIENCE]: Easy-to-dose system: 8 oz of product efficiently deodorizes for 1-2 months [SAFETY]: Storage Deodorant is 100% biodegradable and compatible with antifreeze