After a few collaborations with the band, doing covers of "Celoso" from Los Panchos and "Fool in the rain" from Led Zeppelin, Maná recorded Cuando los ángeles lloran in 1995, the first studio album with Sergio as lead guitar.
Vallín has recorded four other studio albums Sueños Líquidos (1997), Revolución de Amor (2002), Drama Y Luz (2011), and Cama Incendiada (2015) as well as the Maná MTV Unplugged (1999).