RV is a mixture of special cultures of beneficial bacteria that quickly liquefy holding tank solids and eliminates odors. Unlike other holding tank treatments that contain harmful chemicals such as methyl alcohol or formaldehyde, RV treats these systems in an environmentally friendly manner. This product is designed for use in motor home, boats, chemical toilets and outside latrines. Holding tanks treated with RV can be dumped at any dumping station or septic tank without adding harmful chemicals to the system. Bacteria based to liquefy solids. Pleasant fragrance. Will not damage PVC plumbing. Reduces odors. Easy to use.