MasterCare® PRO-BLUE® is a heavy-duty, high-foaming coil cleaner formulated for outdoor HVAC/R applications. Ideal for fan blades and condenser coils, its alkaline blend of aggressive surfactants and brighteners penetrate and lift grease, grime, biological buildup, and oxidation. The foam clings to vertical surfaces, maximizing dwell time and cleaning efficiency, while allowing for fast, residue-free rinsing. It’s biodegradable, NSF approved and built to meet the demands of professional technicians who need consistent, reliable results. Diversitech Pro-Blue™ Coil Cleaner, Foaming Concentrate, 1 gal, Liquid, Odorless, Composition: Water, Sodium Hydroxide, Sodium Carbonate, Sodium Gluconate, 1.19 Specific Gravity, Blue