Product quality and usability are very important in the paints and coatings industry. Until now, preservatives or biocides ensured sufficient shelf life and safe storage of waterbased paints. But new limits for biocides, such as methylisothiazolinone (MIT) and chloromethylisothiazolinone (CIT), in force since May 2020, restrict their use as preservatives. Manufacturing preservative-free products places enormous demands on raw material quality and factory hygiene. Cleaning in paint and coatings production focuses on two factors: product compatibility during product changes and deposits during operation. Pigging technology is often used to clean the pipelines. Non-piggable areas, such ...