They recorded two songs for that CD compilation called Nación Hip Hop, produced by Zeta Bosio of Soda Stereo.
However, a lot of people in the local scene saw it as a betrayal of their underground roots, since they had to change their sound and make it more radio-friendly to be able to sign that contract.
SOon after the album came out, Derek left the group, leaving only three MCs: brothers Smoler and Huexo and Frost who was one of the original pioneers of the Argentine hip-hop scene, being active since the mid-1980s.
In the meantime, they recorded a song called "Piénsalo" (Spanish for "Think about it") for a compilation album released in Chile and Spain.
Through all these years, el Sindicato were victims of a long list of disputes, the most known with theirrivals Koxmoz, but they never gave this much importance.
In 2009, Frost released his first solo album, En Estado Libre (In Free State, referring to his freedom from Sindicato) through the independent international label PHHAT, with production from 23-year-old MC Say.