Two years later, they decided to form their own group, and as a result they began performing locally under the name JAST (composed by the initial letters of band members).

Afterwards, they released their first single "Mach's dir selbst", followed-up by their debut album Verschwende deine Zeit, which became a major success and was eventually certified 7× gold and platinum in Germany and Austria.

At the end of 2004, the band went on tour, and in April 2005 they published their first concert DVD Verschwende deine Zeit – Live, which reached gold status.

[1] In 2005, Silbermond participated in the Berlin installment of Live 8, where they performed "Zeit für Optimisten" after Green Day's set and before Chris De Burgh in the concert lineup.

[3][5] In 2017, Kloß appeared on the fourth season of Sing meinen Song – Das Tauschkonzert, the German adaption of the TV series The Best Singers.