Antimicrobial coating


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The antimicrobial coating for increased infection protection against corona risks

Microorganisms settle down on all surfaces in our environment and can usually multiply unhindered. They stop great health and infection risk especially in Food processing companies and medical institutions therefore have strict requirements for cleanliness and hygiene. Surfaces that are frequently touched by different people (e.g. doorknobs, tables, membrane keypads) or come into contact with food have therefore had to come into contact so far lavishly cleaned and disinfected .

The surface coating Rhenoguard® AS kills microorganisms as Bacteria, virus and fungal cultures Reliable. The settlement and Transmission of germs reduced and thus a permanent protection from Guaranteed pathogens. In this way, secondary bacterial loads can be reduced, especially in times of increased risk of infection (corona pandemic) 

Abklatschtest with nutrient medium

Doorknob coated with Rhenoguard® AS ➝ virtually germ-free
Doorknob uncoated ➝ many microorganisms

Effectiveness of Rhenoguard®

B. Sub. ➝ after 3 h 99,9% of the organisms are killed
E. coli. ➝ after 3 h 99,9% of the organisms are killed

Technical data sheets

Proof of antimicrobial & antiviral effects

The coating was tested by an independent testing laboratory for its effectiveness against two typical test organisms (Escherichia coli [ATCC 4157] and Bacillus subtilis [ATCC 6051]).

1. E. coli → After 3 hours, 99,9% of the organisms are killed
2. B. Sub. → After 3 hours, 99,9% of the organisms are killed

Unlike bacteria, viruses are not living organisms and do not have their own cell metabolism. However, viruses are not invulnerable: they have proteins that are needed for docking with human cells. These proteins contain sulfur compounds, which in turn react with nanosilver at the chemical level. This irreversibly destroys the proteins and, for example, prevents docking to potential host cells.

The effectiveness of nanosilver against viruses has been proven in numerous scientific studies that have been carried out worldwide (Source 1-7). 


  1. International Journal of Nanomedicine, 7, 5007-18 (2012). Inactivation of microbial infectiousness by silver nanoparticles-coated condom: a newapproach to inhibit HIV-and HSV-transmitted infection.
  2. Molecules (Basel, Switzerland) (2011) Silver nanoparticles as potential antiviral agents.
  3. Journal of Nanobiotechnology (2010), 8: 1 Mode of antiviral action of silver nanoparticles against HIV-1
  4. DARU Vol 17, No. 2 (2009), 88 In Vitro Antiviral Effect of “Nanosilver” on Influenza Virus
  5. Antivir Ther. (2008); 13 (2): 253-62. Silver nanoparticles inhibit hepatitis B virus replication.
  6. J. Nanobiotechnol. (2005) 3, 6 Interaction of silver nanoparticles with HIV-1
  7. Biomaterials (2014), Lv X, et al., Inhibitory effect of silver nanomaterials on transmissible virus-induced host cell infections


  • Hospital facilities, medical / pharmaceutical installations
  • handrails
  • Door and handholds in private and public areas

Typical applications

  • Hospital facilities, medical / pharmaceutical installations
  • handrails
  • Door and handholds in private and public areas

RHENOGUARD® AS Antibacterial

Is my door handle contagious?

In a new study, US researchers have found that Sars-CoV-2 is infectious for up to three hours in airborne particles, up to four hours on copper, up to 24 hours on cardboard, and two to three days on plastic and stainless steel Steel. "(2)

In contrast to macrosilver, nanosilver is effective against viruses, as was shown in the investigation of HI viruses. The effect is strongly dependent on the size of the particles: Only nanosilver in the range from 1 to 10 nm has been effectively bound to the virus surface and thus prevents the virus from binding to the host cells. (2)

(1) Quelle: https://www.spiegel.de/wissenschaft/medizin/coronavirus-so-lange-ueberdauert-sars-cov-2-auf-oberflaechen-a-f84ce281-cac3-42e9-a52a-b1e2f035f56d
(2) Source: Elechiguerra JL, Burt JL, Morones JR, Camacho-Bragado A, Gao X, Lara HH, Yacaman MJ (2005). Interaction of silver nanoparticles with HIV-1. J Nanobiotechnology 3: 6

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