Product information

Descaling of Boilers, Descaling of Diesel Engine Cooling Water Systems, Condensers, Evaporators, Calorifiers, Heat Exchangers:

Unitor™ has developed a 210 litres capacity cleaning unit designed among other for use with chemical acid solutions for cleaning boilers, calorifiers, heat exchangers and other types of equipment where rust and scale form.

Unitor™ Chemical Cleaning Unit: Product no. 737189


  • Dry acid concentrated 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
  • Removes scale from boilers and diesel engine cooling water systems
  • Removes scale and rust from condensers, evaporators, heat exchangers etc.


  • Efficient, economical, and safe to use
  • Fast and effective scale remover



Approved by the Norwegian National Institute of Public Health for cleaning of evaporators.

Safety Data Sheet (SDS)


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.

If the equipment to be cleaned is contaminated by oil, grease and sludge, then pre-cleaning with Unitor™ Seaclean Plus or Unitor™ Enviroclean is necessary.

Depending on the extent of scaling, use a solution of 2.5--10% Unitor™ Descalex™. The solution will have a red colour which disappear when the solution is neutralised. Whenever possible, the solution should be heated to 60°C.

Neutralised solutions can be reactivated by adding more Unitor™ Descalex™ until the red colour reappears. This should not be done more than twice.

Unitor™ Descalex™ should not be used on aluminium, zinc, tin or galvanised surfaces.

After use of Unitor™ Descalex™ a 0.5% solution of Nalfleet™ Alkalinity Control in fresh water should be used for neutralisation.