Gasolin' (also called Gas 1) is the debut studio album by Danish rock band Gasolin'. It was released in November 1971 by CBS Records. Instead of boogie rock and catchy tunes, they relied on creating songs with a moody feel such as "Langebro", "Fra dag til dag" and "Tremastet beton". The latter is recited by the poet Mogens Mogensen. Lead singer Kim Larsen later jokingly referred to the song as the first Danish rap. The lyrics and the music has a dark and mysterious ambience. From this album "Langebro" was released on single with "Lilli-Lilli" on the b-side.
The album was released on CD in 1987 with Gasolin' 2 (1972) but due to lack of space "Tremastet beton" was omitted. It was remastered for CD in 1991 and in 2003 it was included in The Black Box box set.