The façades of the 'Musée de la Civilisation à Québec are protected with PSS 20 against graffiti. PSS 20 is a fully water-based product made of polysaccharides from plants (starch, cellulose). More than 7 millions square metres have already been protected with PSS 20 since 1991 including such famous buildings as the Brandenburg Gate in Berlin, the Cathedral of Cologne. The work in Quebec was carried out by the Canadian PSS partner ' Eco-Graffiti Inc. of Quebec (www.ecograffiti.com)