An ionic form of a metal is used in places constantly exposed to humidity for protection against mould that is safe both in terms of health and environment. Lay people know it as a jewellery or coinage metal: silver. This silver technology is available in the OTTOSEAL® S 130 and S 140 joint silicones under the brand name Fungitect®. Comparative endurance tests with silicones containing fungicide in the conventional manner showed a clear result: both of the innovative OTTO products came through with flying colours and gave the bathroom significantly longer-term protection against the dreaded mould. This is because, unlike other silicones containing anti-mould features, Fungitect® is not washed out and can therefore remain effective over a longer period. Natural stone can also be perfectly grouted with both products, by the way.
Biologically active mould protection thanks to
Silver – the natural
enemy of mould
The anti-bacterial effect of silver has long been well-known. In medicine, it is used in plasters, for example, or in surgical instruments. But not all silver is created equal. Again and again we read about nano-silver, which is used to kill germs. Nano-silver is silver in its smallest metallic form (up to 300 billionths of a metre). Nano-silver is suspected, however, of also having a negative effect on the health of mammals. According to the Federal Environmental Agency, it penetrates into the cells and leads to waste water contamination as an anti-bacterial additive. Moreover, a relatively high concentration is required (1,000 to 10,000 ppm) in order to fully exert its efficacy. This is why OTTO uses ionic silver in OTTO Fungitect® Silver Technology. It does not penetrate into the cells and causes much less contamination of waste water. It also needs a significantly lower concentration (25 to 300 ppm) to be effective against mould in sealants.