For increased protection against infection with corona risks

Microorganisms settle on all surfaces in our environment and can usually multiply unhindered. They pose a significant risk to health and infection. For this reason, strict cleanliness and hygiene standards apply, especially in food processing plants and medical facilities. Surfaces that are frequently touched by different people (e.g. doorknobs, tables, membrane keyboards) or come into contact with food therefore have to be cleaned and disinfected at great expense up to now.

The antimicrobial surface coating Rhenoguard® AS reliably kills microorganisms such as bacteria, viruses and fungal cultures. The settlement and transmission of germs is reduced and thus a permanent protection against pathogens guaranteed. In this way, secondary bacterial loads can be reduced, especially in times of increased risk of infection (such as the corona pandemic).

Typical applications

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

Our antimicrobial coating Rhenoguard AS® is designed to offer long-lasting protection against microorganisms such as bacteria, viruses and fungal cultures. The antimicrobial substances are processed in such a way that, for example, washing out via cleaning and disinfection measures is avoided as far as possible. Especially in food processing companies and medical facilities, the effect must be effective throughout and must not lose effectiveness. Thanks to our many years of experience in the coatings industry, we guarantee you the best possible result if you choose the antimicrobial coating Rhenoguard AS®.

contact test with breeding ground

Antibacterial coating, Rhenoguard® AS

Doorknob coated with Rhenoguard® AS ➝ almost sterile

Antibacterial coating, Rhenoguard® AS kills microorganisms such as bacteria and fungal cultures.

Doorknob uncoated ➝ many microorganisms

Effectiveness from Rhenoguard®

proof of effectiveness the antimicrobial coating

The antimicrobial coating Rhenoguard AS® 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 beings and do not have their own cell metabolism. Nevertheless, viruses are not unassailable: they have proteins that are required for docking with human cells, among other things. These proteins contain sulfur compounds, which in turn react with nanosilver at a chemical level. As a result, the proteins are irreversibly destroyed and, for example, docking to potential host cells is prevented. Our antimicrobial coating takes advantage of this effect to protect you from potentially dangerous viruses and bacteria.

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 new approach 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

Study: Is mine doorknob contagious?

In a study, US researchers found that Sars-CoV-2 is infectious for up to three hours in particles in the air, up to four hours on copper, up to 24 hours on cardboard and two to three days on plastic and stainless steel . (1)

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

For this reason we recommend our antimicrobial coating Rhenoguard AS®! In this way you ensure reliable killing of microorganisms such as bacteria, viruses and fungal cultures and thus minimize the chance of transmission.

(1) Quelle:
(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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Technical data sheets

Rhenoguard® MK I-clear / ASRhenoguard® MK I-green, -grey, -red / AS

Product features from Rhenoguard®

Rhenoguard AS for your application

Rhenoguard AS protects against potentially dangerous viruses and bacteria and is suitable for many fields of application. We would be happy to discuss whether our antimicrobial coating is the right way for you in a joint consultation. Take the first step now and contact us to start your journey to more hygiene and better health protection.

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