Solid Cooling Tower Halogen/Oxidiser Resistant Corrosion/Scale Inhibitor


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WTP HS4390 is a solid halogen/oxidiser resistant corrosion inhibitor designed for soft to medium hardness waters that have corrosion potential.

Contains background scale inhibitors to protect against hardness slippage or over-concentration of system water. WTP HS4390 contains a synergistic blend of phosphonocarboxylate and sodium molybdate to provide excellent corrosion inhibition.


WTP HS4390 is dosed via the solids dissolver to maintain a system reserve of 20 to 30 ppm.

The system reserve can be monitored by either use of a molybdate test kit or a phosphonate test kit.

Molybdate as MoO4 X 6 = reserve as product



WTP HS4390 is neutral in solution. Suitable protective clothing should be used to prevent possible skin and eye contact.  For full product information please refer to MSDS.


WTP HS4390 treatments are shipped in 5kg non-returnable HDPE jars.  


Field representatives can work closely with customer personnel to ensure the effective application of the water treatment programme. Regular service calls will be provided by qualified personnel.

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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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