The internal shells of buildings can be a potent residence for germs and bacteria to grow. In circumstances where there is high moisture and nutrients in these places; many microbes, including pathogenic classes, are bring into being in constructional materials like tiles, ceramics, plasters, walls and concrete exteriors. Different sorts of surfaces can be coated with antibacterial paint to avoid growth of bacterial. Antibacterial acrylic paints comprising nanoparticles are used to make a fresh surface for a long lifetime. Water-based acrylic nano paints are a novel group of constructional paints that are frequently used due to ecological matters as well as not using organic solvents.
This product can be used on all surfaces of cement, gypsum, brick, and stone to make antibacterial coating on walls and ceilings in almost every housing, commercial, educational, health, sporting and other places.
The antibacterial influence vividly increases in the nanometer scale, as they are talented to slaughter more than 650 kinds of bacteria. These nanoparticles also display robust antifungal activity against specific fungal contagions. As the particle size decreases, the ion release increases, which upsurges their antibacterial commotion. By nanotechnology and addition of nanoparticles, an exclusive characteristic has been shaped in such product. In this way, this paint can create a fresh superficial area for a long period, and after putting on the paint on the surfaces, any microorganisms are exterminated as soon as they touch the paint. On the other hand, with the vanishing of antibacterial properties, it is likely to make this property by spraying colorless nano-materials.
The antibacterial activity of these substances in contradiction of human pathogenic bacteria such as S. Aureus and E. Coli has been proven. The consequences of the antibacterial properties examination achieved on the stated product are exposed in the table below, which checks the properties of this product:
| | Antibacterial activity |
| Acceptable standard limit | 2 (equivalent to 99%) |
| Nano sample (E.Coli) | 2.81 |
| Nano sample (S.Aureus ) | 2.88 |
According to the standard, the effect is important when the antibacterial activity of the product is between 2 and 3; If the antibacterial activity is more than 3, it has a strong effect. So, according to the Iran-ISO national standard No. 1-80004 and according to the detected possessions of the nanometer constituent, this product can be considered as nanotechnology.