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    AI Overview
    Water-based pigment paint requires robust antimicrobial preservatives to prevent microbial growth (bacteria/fungi) in the can (wet-state) and after application (dry-film). Common, effective options include CMI/MI mixtures (like KATHON™ LX), BIT, DBNPA for quick-kill, and silver-ion additives for long-term dry-film protection. These ensure stability, pH balance, and prevent spoilage in aqueous formulations. 
    Key Antimicrobial Preservatives 
    • In-Can Preservatives (Wet-State):
      • CMI/MI (Chloromethylisothiazolone/methylisothiazolone): A "workhorse" preservative for water-based paints, effective at 0.1–0.15% concentration, stable up to pH 8.5.
      • BIT (Benzisothiazolinone): Often used for long-term protection, frequently blended with MIT/CMIT to balance immediate and long-term activity.
      • DBNPA (2,2-Dibromo-3-nitrilopropionamide): Often found in Busan 94, this provides rapid sterilization (quick-kill) of bacteria and fungi in water-based coatings.
      • Sodium Pyrithione: Used as an industrial preservative, often for in-can protection. 
    • Dry-Film/Antimicrobial Preservatives (Post-Application):
      • Silver Ions (
        Ag+cap A g raised to the positive power
        𝑨𝒈+
        ):         Frequently used in antimicrobial paints to inhibit bacterial growth on surfaces, such as E. coli or S. aureus.
      • IPBC (Iodopropynyl butylcarbamate): Highly effective as a dry-film fungicide in paints to prevent mold and mildew, particularly in humid environments.
      • Zinc Pyrithione (ZPT): Used as both an antimicrobial and antifungal additive. 
    Top Product Selections 
    • KATHON™ LX 1.5%: A broad-spectrum CMI/MI preservative, ideal for aqueous paints, coatings, and pigment dispersions.
    • Busan® 94 NA: A 20% active water-soluble biocide used for rapid bacteria control, effective at 0.0025% to 0.20% by weight.
    • DOWICIL™ QK-20: A DBNPA-based, fast-acting, broad-spectrum preservative suitable for treating production batches and in-can protection. 
    Formulation Considerations 
    • pH Levels: Most microorganisms thrive between pH 4 and 9, which matches the typical pH of waterborne coatings, making active preservation crucial. 
    • Additives: In addition to preservatives, antimicrobial paint formulas often include biocides (like silver) and anti-fungals to provide 99.9% killing effectiveness against microbes. 
    • Compatibility: Chosen preservatives must not cause coagulation or alter the viscosity, color, or gloss of the pigment dispersion. 
    • The Rise of Water-Based Formulations
      Jan 18, 2019 — Sometimes referred to as the workhorse preservative for in-can preservation of water-based paints and binders with pH up to 8.5, c...
      Foreverest Resources Ltd
    • BUCKMAN PAINT AND COATINGS PRODUCT OVERVIEW
      Busan 94 NA Busan 94 NA is a 20 % active 2,2-Dibromo-3-nitrilopropionamide. water-soluble microbicide that is effective in the con...
      www.buckman.com
    • Long-Lasting Antimicrobial and Antiviral Surface Coatings - HDIAC
      Apr 22, 2020 — 2.2 Sherwin Williams Antimicrobial Paint. Sherwin Williams markets a product called Paint Shield microbicidal paint, which claims ...
      HDIAC (.mil)
    Show all
    • The Rise of Water-Based Formulations
      Jan 18, 2019 — Sometimes referred to as the workhorse preservative for in-can preservation of water-based paints and binders with pH up to 8.5, c...
      Foreverest Resources Ltd
    • BUCKMAN PAINT AND COATINGS PRODUCT OVERVIEW
      Busan 94 NA Busan 94 NA is a 20 % active 2,2-Dibromo-3-nitrilopropionamide. water-soluble microbicide that is effective in the con...
      www.buckman.com
    • Long-Lasting Antimicrobial and Antiviral Surface Coatings - HDIAC
      Apr 22, 2020 — 2.2 Sherwin Williams Antimicrobial Paint. Sherwin Williams markets a product called Paint Shield microbicidal paint, which claims ...
      HDIAC (.mil)
    • ANTIMICROBIALS FOR INDUSTRIAL APPLICATIONS
      * Jubilant's Jubithione® NaPT is amber color, clear, 40% aqueous. * solution of Sodium Pyrithione. * Advantages.
      Jubilant Ingrevia
    • Innovating In-Can Preservatives Depends on Finding and Testing ...
      Jul 8, 2021 — Effective at low concentrations, DBNPA provides a broad-spectrum quick-kill of bacteria, mold and yeast. It is completely miscible...
      PCI Magazine
    • Paints & Coatings - Onnovo Group
      Onnoguard® and Onnotech® – Enhancing Durability & Microbial Resistance in Coatings. Onnovo offers a comprehensive range of preserv...
      Onnovo Group
    • Antimicrobial Paints and Coatings | 2021-07-12 | PCI Magazine
      Jul 12, 2021 — The antimicrobial active ingredient generally used in paints and coatings is silver ion — it's well proven, offers excellent effic...
      PCI Magazine
    • Waterborne Coatings Preservation - SpecialChem
      Nov 19, 2020 — Cellulosic thickeners can supply nutrients for many types of microorganisms. The optimal pH range for the growth of microorganisms...
      SpecialChem
    • Anti-Microbial Emulsion Paint / paint manufacturing - by Glina ...
      Apr 5, 2025 — To make anti-microbial emulsion paint, you'll need water, carbon PT, biocide, EPW (antifungal), silver on additives, calcium carbo...
      11:23
      YouTube·Glina Artistic Paint Education
    • What is Antimicrobial Interior Paint? And is It Worth The Cost?
      Nov 7, 2022 — What is Antimicrobial Paint? Also known as antibacterial, antimicrobial paint is a type of paint that contains ingredients that ar...
      ITech Painters
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    Architectural paints grade bactericide


    China AAB Industry Technology Group
    https://www.aabindustrygroup.com › architectural-paints...
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    How to apply antimicrobial paint?
    Shake coating before each use to ensure antimicrobial properties are distributed throughout the coating.
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    How Does Antimicrobial Wall Paint Work? When creating this specialty paint, manufacturers use an antimicrobial additive to make the paint resistant to bacteria and other microbes. Upon application, it actively kills 99.9% of bacteria and viruses within two hours of exposure to the painted surface.Jun 30, 2025

    Protect Your Family Learn About Safe Antimicrobial Paint


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    Web results

    The Rise of Water-Based Formulations


    Foreverest Resources Ltd
    https://foreverest.net › news-list › the-rise-of-water-base...
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    CMI/MI preservatives are compatible with water-based paints, and typically do not cause coagulation or changes in viscosity, color, gloss, film formation or ...Read more

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    by J Levin — In addition to the high-pH inorganic paints, another route to biocide-free paints is through the use of super-hydrophobic ingredients to reduce microbial growth ...Read more
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