RPG-2017 is a viscous liquid that clings to pipes and drain lines to rid them of drain fly infestations, all while working to break down odor causing build-up. RGP-2017 repels annoying and unsanitary drain flies with Citronella, a natural fly repellent. It also contains enzyme producing bacteria, which will multiply and digest organic waste, reduce volume of solids and kill malodors. RGP-2017 contains no acids or corrosives. It is biodegradable, non-toxic and non caustic.