  We propose a new radion stabilization mechanism in the Randall-Sundrum
spacetime, introducing a bulk ${SU(N_H)}$ gauge field which confines at a TeV
scale. It turns out that the radion is stabilized by the balance between a
brane tension and a pressure due to the Casimir energy of the strong
${SU(N_H)}$ gauge field. We investigate the phase transition between the
Randall-Sundrum (compactified) spacetime and a de-compactified spacetime and
determine the parameter regime in which eternal (old) inflation is avoided and
the phase transition can be completed. In comparison to the Goldberger-Wise
mechanism, the 5D Planck mass can be larger than the AdS curvature and a
classical description of the gravity is reliable in our stabilization
mechanism. We also discuss the effect of the phase transition in cosmology such
as an entropy dilution and a production of gravitational waves.
