Water recirculating in cooling systems can become contaminated with bacteria, algae, fungi and protozoa that lead to the formation of biofilms – often referred to as slime. If untreated, slime may lead to operational inefficiencies, microbial induced corrosion (MIC) and can potentially host harmful micro-organisms. Our leading cooling water treatment technologies control fouling and maintain system integrity.

Our cooling water treatment technologies inhibit microbial growth under a wide range of operating conditions found in typical systems, such as temperature, pH, sunlight, aeration and nutrient level in makeup water.


Some of our products are listed below. Not all products are available for sale or registered/approved for use in all countries.
Contact your sales representative or refer to our Contact Form to learn about product availability and approvals in your country

Cooling Water

Product Name

Active Ingredient *

Features & Benefits

AQUCAR™ DC 4P25 Water Treatment Microbicide



    • Supplied as a 4.25 % formulation
    • Exceptional algicidal activity can reduce dosing frequency
    • Rapid loss of “green” color in obviously fouled towers
    • No bioaccumulation in the environment
    • OECD 301B inherently biodegradable

    AQUCAR™ DB 20 Water Treatment Microbiocide

    AQUCAR™ DB 100 Water Treatment Microbiocide
    (free-flowing, white crystalline solid)


    • Compatible with all types of water treatment chemicals
    • Broad-spectrum control of bacteria, fungi, yeast, cyanobacteria and true algae
    • Fast acting, can be used as a knockdown biocide treatment

    AQUCAR™ GA 135 Water Treatment Microbiocide

    AQUCAR™ GA 24 Water Treatment Microbiocide

    AQUCAR™ GA 25 Water Treatment Microbiocide

    AQUCAR™ GA 50 Water Treatment Microbiocide


    • Available in different levels of active ingredient
    • Effective in controlling slime-forming bacteria, sulfate-reducing bacteria , spore-forming bacteria, fungi and algae
    • Readily biodegradable – passes OECD 301A test


    KATHON™ WT Biocide

    KATHON™ WT 1.5 Biocide

    KATHON™ WTE Biocide


    • Available as 1.5% and 14% liquid formulations
    • Broad-spectrum biocide effective against biofilm
    • Rapid inhibition of microbial growth and enzyme synthesis
    • Effective at low concentrations
    • OECD 301B inherently biodegradable

    KATHON™ CF 150 Biocide

    KATHON™ CF 1400 Biocide


    • Supplied as a 1.5% and 14% formulations
    • No copper salts required for stabilization depending on product and use level

    KATHON™ 725 BF Antimicrobial

    CMIT/MIT + surfactant

    • Combines the exceptional efficacy of KATHON™ with a sustainable and low foaming surfactant in one drum
    • No copper salts as stabilizers

    *DCOIT: 4,5-dichloro-2-n-octyl-3(2H)- isothiazolinone / DBNPA: 2,2-dibromo-3- nitrilopropionamide / CMIT/MIT: 5-chloro-2-methyl-4-isothiazolin-3- one & 2-methyl-4-isothiazolin-3-one