Disclosed is a wood preservative composition comprising micronized copper andcopper-amine complex, whereinthe copper component of the copper amine complex is from about 5% to about 50%by weight, based upon the total weight ofcopper in the composition. The copper amine complex serves to avoid woodsurface 'chalking' that is otherwise attributable to thepresence of micronized copper in copper-based slurries used to treat woodproducts. In addition, the copper-amine complex enhancesthe antimicrobial efficacy of the composition when used in wood treatmentapplications by facilitating cell wall penetrationof the treated wood.
