Fos-D Low Foam Boilerclean

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A concentrated blend of acids and detergents. It tackles the really tough jobs, yet is harmless to floors and drains. It does not contain harsh muriatic or hydrochloric acid. Removes rust, oxidation and corrosion.


Floors, swimming pools, stainless steel, showers, boilers, water meters, tile and grout, aluminum, sinks, pipes, walls, air conditioning coils, drinking fountains, bath tub.

Directions for Use

Pre-test surface to be cleaned for deleterious action. Dilute 1 to 1 with water for heavy soil or 1 to 4 with water for light soil. Apply to soiled surface with brush or spray and allow to soak for 5-10 minutes, then flush off with clear water. Alternate method is to put cleaning solution into a suitable plastic or rubber-lined  chemical tank and dip small parts to be cleaned. Cleaning solution may be heated to 125° F.

For boiler heavy cleaning: use 1 gallon product per 20 gallons water.


  • Packaged: Drums, 5-gallon pail, 4 1-gallons
  • Appearance : Blue liquid
  • Fragrance: Characteristic
  • pH: 1.00
  • Flash point: None, non-flammable
  • Acid type: Phosphoric