Solid is the fifth studio album by German
heavy metal band
U.D.O. It is the first in six years, when frontman
Udo Dirkschneider put the band on hiatus and reunited with
Accept. Accept's drummer
Stefan Kaufmann joined U.D.O. as a guitar player on this album. Guitarists Fitty Weinhold and Jürgen Graf from Bullet were hired as new members.
The album was recorded and mixed at Roxx Studios in
Pulheim.[3]