The Allpoints 8012868 Nu-Calgon Nu-Brite 1 Gallon is a powerful, non-acid, alkaline-based cleaner for cleaning and brightening air-cooled condensers. This non-acid cleaner removes dirt, grime and buildup that may hinder the performance of the condenser and reduce energy consumption. It is better for outdoor applications and gives a professional finish without any hazards of using acid... https://partsfe.com/8012868-allpoints-nu-calgon-nu-brite-1-gallon-4291-08