The aqueous environment and the raw materials used in paints and coatings provide the ideal breeding ground for bacteria, fungi and yeasts. The pH value of usually 7-9 is also ideal for growth. The resulting microorganisms not only look unattractive, they can also be a health hazard and also reduce the quality of the paints and coatings - viscosities can change and color shades can shift. Unfortunately, since it is not possible to work without raw materials such as cellulose ether and water, other preservation measures must be used. Biocides, especially isothiazolins, are valuable tools. They are used with great ...