The present invention is directed to a biocidal composition comprising a blend of zinc pyrithione and 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile (traloypryil) wherein said biocidal composition is copper free or low copper content. A coating composition comprising this biocidal composition as well as a method of coating a substrate and a coated wood, plastic, leather vinyl or metal substrate are also disclosed.本發明係針對一種包含一或多種吡啶硫酮化合物及一或多種式I之吡咯化合物之摻和物的殺生物組合物，其中該殺生物組合物不含銅或具有低銅含量。
