In today’s world, there are plenty of spaces that need to be kept sanitary and clean 24 hours a day. Whether it’s a simple toilet lid or hospital exam table, these areas requires a variety of cleaning solutions and coatings in order to ensure they are hygienic and safe to use.
Oliver Sonntag from Nano-Care Deutschland AG has recently introduced a new and very aggressive form of coating that literally impales bacteria when they come into contact with a surface, rendering them harmless.
Oliver answered some questions about his product, Liquid Guard.
Your company has developed an antimicrobial coating that utilises advanced nanotechnology. How does it work?
Contrary to silver ion based biocides that work to disrupt the microbial metabolism, our product (Liquid Guard) is a physical barrier. The liquid has allowed us to engineer a structure of sharp, spike like molecules that quite literally rupture the cell walls of incoming microorganisms, causing them to burst and become harmless.
This physical effect is advantageous for several reasons, namely that it allows for a permanent antimicrobial barrier that lasts a long time. The microbial metabolism is not interfered with and this means we avoid causing mutations that would otherwise occur after repeated exposure to the same biochemical reaction.
How often does the protection need to be reapplied?
This mainly depends on how often the treated surface area is being utilised. Toilet lids and doorknobs that are used daily should have the solution reapplied after around a year. Surfaces that are less often utilised won’t be exposed to as much abrasion, meaning the solution can be reapplied less often.
What places can the coating be used?
It can be used anywhere, although there are still some regulatory concerns surrounding the medical field. Before it could be applied to medical devices, it would need to be itself approved as a medical device. Our company is currently engaged in the process of getting this approval so that the solution can be applied directly onto products as they are manufactured.
We currently maintain registration as a biocidal product, making the solution acceptable for use in hospital environments or on surfaces that patients come into direct contact with. We are keeping this recommendation for hospital use in 2019 and we are this month beginning talks with the Robert Koch Institute.
What certifications does Liquid Guard currently have?
Currently Liquid Guard is certified to be used and marketed as a biocidal solution in Germany. We are also eager to register the product in the majority of other EU countries. An institute has also rated our product as “excellent” as part of a skin patch test.
The test involved 30 students who wore plastic sheets on their backs that were coated with Liquid Guard for 72 hours. Independent testing used an accelerated aging protocol on the coating in order to establish the integrity and longevity of the solution.
Results showed a 99.99 percent reduction in germs after a simulated aging time of one year. We are proud to announce that Liquid Guard was nominated for the German Innovation Award for 2019.
Does the coating need to be applied by an expert or can anyone do it?
Anyone can apply Liquid Guard. You are able to order the product either as a wet wipe or a liquid. All the wipes are wrapped individually, allowing users to apply the coating directly after removal. Wiping on the coating is very simple and the surface can be used after 6 hours.
Are there any pathogens that have proven resistant to Liquid Guard?
So far we have not detected any resistant pathogens. We have tested both gram-positive and gram-negative microorganisms with 99.99 of them rendered harmless. According to the Japanese standard JIS Z 2801: 2012, this qualifies as “total kill”. This test is very difficult to pass with a high amount of germs being applied to the testing surface. This has allowed us to prove our product against a large number of CFU’s (colony forming units).