  Here we design boundary feedback stabilizers to unbounded trajectories, for
semi-linear stochastic heat equation with cubic non-linearity. The feedback
controller is linear, given in a simple explicit form and involves only the
eigenfunctions of the Laplace operator. It is supported in a given open subset
of the boundary of the domain. Via a rescaling argument, we transform the
stochastic equation into a random deterministic one. Then, the simple form of
the feedback, we propose here, allows to write the solution, of the random
equation, in a mild formulation via a kernel. Appealing to a fixed point
argument the existence \& stabilization result is proved.
