NO FOAM defoamer concentrate, when added to a carpet cleaner recovery tank, quickly kills foam caused by detergents or other chemicals. NO FOAM is also excellent for water towers, cooling systems, boilers, recycling fountains, or anywhere detergent, soap, or surfactants cause foaming. Non-corrosive Non-oxidizing Non-polluting Gallons (4x1), Drums (55 gal), Pails (5, 6 gal)