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Antimicrobial additive for Paints

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Antimicrobial additives are products that provide antibacterial and antifungal property to any dispersion or solid matrix. The additives are fillers which enhance the value of the overall product by making it highly effective against germs and microorganisms.

Antimicrobial additive in paints are important for a number of reasons :

  • Antimicrobial paint additives can kill the bacteria on the surface and stop any growth of molds or fungus :Specific antimicrobial paint additives are effective against a plethora of microbes, including some antibiotic-resistant strains of bacteria. Suitable for use on an array of different surfaces, these innovative paints work to minimize the risk of cross-contamination, ultimately making them ideal for use in hygiene critical environments.
  • Antimicrobial paint additives help surfaces look better for longer: Antimicrobial paint additives have the ability to resist unsightly mold and mildew growth. This makes them a perfect addition to paints that are marketed for use in moist or humid environments, such as bathrooms.
  • Antimicrobial paint additives can prolong the expected lifetime of paint products: Different types of paints have varied shelf-life expectancy. Unopened acrylic paints, for example, have been known to last for up to ten years, and it is not uncommon for unused oil-based paints to make it into their mid-teens. However, once the lids have been lifted and paints are exposed to air, they are at an increased risk of developing the intolerable stench and ill-favored lumpiness so often associated with microbial paint contamination.

Antimicrobial paint additives have been proven to prolong the shelf-life of paint products. Their efficacy against bacteria and mould helps to minimise the risk of premature product degradation, ensuring paints remain usable for longer.

According to research by Gallup (2019), 66% of consumers are willing to pay more for antimicrobial products. If you are looking to differentiate your paints, integrated protection against fouling microbes is definitely a cost-effective feature worth exploring.

Antimicrobial additive for different types of Paints

Water Based Paints

They are highly popular since it doesn’t require a pre-treatment, no mildew growth, low VOCs (low levels of toxic emissions), easy cleanup with water, quick drying, an elastic, flexible finish resistant to cracking, can be used on almost all surfaces and stable color over time, doesn’t yellow or fade in sunlight. Our antimicrobial additive for water based paints does a tremendous job in keeping the surface microbe-free.

Here are the links to our water based antimicrobial additives :

Solvent-Based Paints

Oil-based paint can be used on almost all surfaces, and is praised for its high durability and rich finish. They are mostly used for attractive gloss, good for high-moisture rooms (ex. bathroom or kitchen), longer dry time (good for making fixes), good “leveling” (brush strokes fill themselves in to create a smooth finish) and hard, durable finish. Our antimicrobial additive for solvent based paints does a tremendous job in keeping the surface microbe-free.

Here are the links to our solvent based based antimicrobial additives :

Mechanism of action

Bacteria have specific characteristics that explain their behavior in contact with metal nanoparticles. Since the main toxicological effect induced by antimicrobial compounds in bacteria occurs by direct contact with the cell surface, it is important to understand the differences between the cell wall of Gram-positive and Gram-negative bacteria.

Both Gram-positive and Gram-negative bacteria have a negatively charged surface.

Gram-positive bacteria have a thick layer of peptidoglycan formed by linear chains alternatingresidues of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) linked together by a sequence of 3 to 5 amino acids that cross-link each other, forming a cohesive mesh. Additionally, negatively charged acids (with high levels of phosphate groups) extend from the cell wall to the surface of most Gram-positive bacteria. Gram-negative bacteria, on the other hand, have a slightly more complex structure. In addition to the thin layer of peptidoglycan, Gram-negative bacteria have a phospholipid outer membrane with partially phosphorylated lipopolysaccharides (LPS) that contribute to increase the negative surface charge of their cell envelope.

Negatively charged bacterial cell walls attract positively charged nanoparticles to their surface due to electrostatic interactions. On the other hand, positively charged metal-based nanoparticles establish a strong bond with membranes, resulting in disruption of cell walls and, consequently, increase their permeability. In addition, nanoparticles can also release metal ions from the extracellular space, capable of entering the cell and disrupt biological processes. Inside the cell, either metal ions or nanoparticles can induce production of reactive oxygen species (ROS). The oxidative stress generated leads to oxidation of glutathione, thus suppressing the antioxidant defense mechanism of bacteria against ROS. The metal ions are then free to interact with cellular structures (e.g., proteins, membranes, DNA), disrupting cell functions. Metal ions can form strong coordination bonds with N, O, or S atoms which are abundant in organic compounds and biomolecules. Since the bond between metal ions and biomolecules is generally non-specific, metal-based nanoparticles generally exhibit a broad spectrum activity.

Metal-based nanoparticles are known to have non-specific bacterial toxicity mechanisms (they do not bind to a specific receptor in the bacterial cell) which not only makes the development of resistance by bacteria difficult, but also broadens the spectrum of antibacterial activity. As a result, a large majority of metal-based nanoparticles efficacy studies performed so far have shown promising results in both Gram-positive and Gram-negative bacteria.

Key benefits

  • excellent performance against bacteria and fungi
  • Long lasting effect
  • No discoloration of paints
  • No effect on odor of the paint
  • non-toxic to human skin


The product image(s) shown is a reference for the actual product. While every effort has been made to maintain complete accuracy and up to date product information, it is important to go through details such as product labels, manufacturing details, batch, warnings, and directions before using a packaged product. For additional information,  please refer to the contact details mentioned on the label. This is not a medical device & for use only as an additive to paint/ coating and other products, does not guarantee against infections and is not a cure. Users are recommended to test the product before usage and the suppliers warrantee is only for the cost of product not for any incidental losses  or third party losses.

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