  In this note, we consider the nonlocal Cahn-Hilliard equation with constant
mobility and singular potential in three dimensional bounded and smooth
domains. Given any global solution (whose existence and uniqueness are already
known), we prove the so-called {\it instantaneous} and {\it uniform} separation
property: any global solution with initial finite energy is globally confined
(in the $L^\infty$ metric) in the interval $[-1+\delta,1-\delta]$ on the time
interval $[\tau,\infty)$ for any $\tau>0$, where $\delta$ only depends on the
norms of the initial datum, $\tau$ and the parameters of the system. We then
exploit such result to improve the regularity of the global attractor for the
dynamical system associated to the problem.
