However, due to missing contacts to the art world outside of the conservative-minded artist circles of Aarau, Urech-Seon oeuvre – in particular his abstract paintings – remained unnoticed for long.
Only until "joining the Association of modern artists in Switzerland (Allianz), Rudolf Urech-Seon, over 70 years old by then, became part of Switzerland’s avant-garde movement. As a result, he exhibits at the following Allianz exhibitions at the Art Association of St. Gallen, at the Kunsthaus Zürich and at the Helmhaus Zürich, as well as twice at the Salon des Réalités Nouvelles in Paris in 1948 and 1950." (Stephan Kunz, Ein Anti-Held der Moderne, p. 73).
Throughout his life, Urech-Seon remained an outsider artist in Aargau. Increasingly isolated by the Society of Swiss Painters and Sculptors (GSMBA), the artist led a quiet existence in his hometown of Seon.