Abstract: An improved process for penetrating of difficult-to-treat wood with preservative liquids containing metal salts is described. More particularly, the improved process comprises the steps of contacting the wood with a mixture comprising(A-1) a preservative-effective amount of at least one hydrocarbon-soluble metal salt of an organic carboxylic acid wherein the metal is selected from the group consisting of transition metals, zinc, mercury, antimony and lead, and(A-2) a hydrocarbon solvent comprising at least 50% by weight of at least one petroleum distillate.The solvent utilized in the process of the invention optionally may contain one or more aromatic hydrocarbons. Preferably the solvent (A-2) will comprise at least about 50% of at least one paraffinic hydrocarbon having a boiling point above 130.degree. C. The mixture also may contain other desirable components in addition to the metal salts such as insecticides, flame retardants, colorants, fungicides, water repellents, etc.

Abstract: Novel compositions of matter and processes for utilizing such compositions in preserving wood are described. More particularly, the novel compositions comprise(A) at least one metal salt of an organic carboxylic acid containing at least about 6 carbon atoms wherein the metal is selected from the group consisting of transition metals, zinc, mercury, antimony and lead,(B) at least one isothiazolone compound represented by the structural formula ##STR1## wherein R.sup.1 is an alkyl, alkenyl or alkynyl group of 1 to about 18 carbon atoms; a cycloalkyl group having a 3 to 6 carbon atom ring and up to about 12 carbon atoms; an aralkyl or aryl group of up to about 10 carbon atoms; R.sup.2 is hydrogen, halogen or a lower alkyl group; and R.sup.3 is hydrogen, halogen or a lower alkyl group, and p0 (C) at least one solvent/diluent.The solvent/diluent may be water or one or more hydrocarbon solvents.