His body of work consists of 21 albums released along his 26-year career. His musical style is mostly rock and ballad, although he wrote songs in many different styles, including variations of styles typical of his native Northeastern Brazil like Forró and Baião, and in fact often used more than one style in the same song, as in "Let Me Sing, Let Me Sing". His debut album, Raulzito e Os Panteras (1968), was produced when he was part of a band of the same name.
However, he only gained prominence and critical audience with songs from the album Krig-Há, Bandolo! (1973), such as "Ouro de Tolo" ("Fool's Gold"), "Mosca na Sopa" ("Fly in the Soup"), and "Metamorfose Ambulante" ("Walking Metamorphosis"). Raul Seixas developed a unique musical style that emphasized the maverick and the mystic. His album Gita (1974), influenced by figures such as Aleister Crowley, expresses his views very directly.
Many songs in Gita were co-written with his frequent collaborator, then fellow mystic, and future worldwide bestselling author Paulo Coelho. Raul was interested in philosophy (especially metaphysics and ontology), psychology, history, literature and Latin. In October 2008, nineteen years after his death, Raul Seixas was placed in 19th position in a List of One Hundred Greatest Artists of Brazilian music sponsored by the Brazilian edition of Rolling Stone magazine, topping the likes of Milton Nascimento, Maria Bethania, Heitor Villa-Lobos and others, demonstrating the influence that Seixas' music continues to hold today.
Every year on Seixas' birthday, legions of fans, including hundreds of impersonators (many even changing their last name to Seixas as a sign of idolatry), throw a parade in his honor in downtown São Paulo.