Viper RT350D Evap+ Evaporator Coil Cleaner (Drum)Viper RT350D Viper EVAP+ is the industry's only non rinsing evaporator coil cleaner using enzymes in a high performing detergent base. Soils that resist conventional detergents are removed successfully with Viper EVAP+. The solution remains active for 72 hours with condensate production for continuous cleaning and complete odor elimination. The performance is impressive. Features : Non Rinsing Formula Enzymes Destroy Odor Causing Bacteria Non Toxic No