Mould fungus is a problem that affects all RTV-1 commercially available sealants. Therefore, our products contain fungicidal (= fungus inhibiting) agents, with the exception of sealing compounds for applications where this is not permitted. The fungicidal effect of these sealants is limited and therefore not an absolute guarantee of protection. For this reason, we recommend to take the precautions described below.
In case of primary growth, the mould spores must, already in their first stage of development, find a substance to serve them as utilisable nutrient. However, this is not possible in the case of sealants. This means that initially the mould does not affect the sealant itself but a layer of dirt that exists on the surface of the sealant (e.g. textile dust, soap or grease residues). In most cases, mould fungus of a size just visible (black or yellow dots) can still be removed successfully from the surface of the sealant.
Detergents containing chlorine are particularly effective in accomplishing this task. In the case of secondary growth, the mould fungus has already penetrated the sealant which must therefore be removed completely. Additional disinfection of the immediate surroundings of the adherent surfaces with a disinfectant solution has proven to be highly effective. It is absolutely necessary that the new seal be made of a sealant containing fungicidal agents.
In connection with all these countermeasures, it must still be taken into account that they do not eliminate the root cause of mould growth itself. Therefore, if no measures are taken or can be taken to eliminate such cause (e.g. by keeping a place dry, providing sufficient ventilation, cleaning it with a disinfectant), then it will only be a matter of time for the first mould spores to grow again to such a point that the mould fungus becomes visible.