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Star International
Product code: 00910015

Star Powder Acid

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Star Powder Acid is a dry acid cleaner formulated to remove rust and scale deposits, which removes scale from:

  • Boilers.
  • Diesel engine cooling water systems.
  • Condensers, evaporators, heat exchanges etc (also removes rust).


  • Dry acid cleaner contains inhibitors to protect metals.
  • Contains colour indicator to show the strength of the solution and anti-foam agent.
  • Safe and easy handling and storage.
  • Fast and effective scale remover.


25 kg

Directions for use

The most effective descaling is accomplished by circulation. In the case of small components, the soak method in an immersion bath can be used. Depending on the extent of scaling, use a solution of 2.5-10% Star Powder Acid. The solution will have a white colour which disappears when the solution is neutralised.

Whenever possible, the solution should be heated to 60°C. Neutralised solutions can be reactivated by adding more Star Powder Acid until the white colour reappears. This should not be done more than twice.

Star Powder Acid should not be used on aluminium, zinc, tin or galvanised surfaces.

Descaling of boilers, descaling of diesel engine, cooling water systems, condensers, evaporators, clarifiers, and heat exchangers:

The strength of the acid can be enhanced by adding 1 part sodium chloride (common salt) to 20 parts of Star Powder Acid. This enhancement of the cleaning solution, however, should not be used when descaling diesel engine cooling water systems.

Please read the Material Safety Data Sheet before using this product for detailed information on safety and health.

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