OF THE INVENTION An aqueous dispersion of octylisothiazolinone ("OlT") has been found to be a superior vehicle for delivering OIT to wood for protecting the wood from discoloration 5 by mold or fungi. The OIT dispersion can be applied to the wood by spraying, dipping or pressure treating, among other methods. 9062767_1 (GHMatters) P105955.AU FIG. I CH20H 0 O X / H 0 0 FIG. 3 FIG. 4 -0 6 3 L" LO LfL -44