Stable wood preservative formulations comprising an amine copper complex, an azole compound, a cationic surfactant, and optionally, an organic solvent, are disclosed. The wood preservative formulations exhibit long-term stability and remain homogeneous, without the need for agitation.本發明揭示包括胺銅錯合物、唑化合物、陽離子表面活性劑及視需要之有機溶劑之穩定的木材保存劑調配物。該等木材保存劑調配物展現長期穩定性且保持均質,而無需攪拌。