Abstract: A composition or concentrate for preserving wood, which comprises 0.001-5% by weight of cyano-(4-fluoro-3-phenoxyphenyl)-methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate and/or (pentafluorophenyl)-methyl 1R, 3R-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate or enantiomeric compounds thereof and more than 75% by weight, preferably more than 90% by weight, of a mixture comprising at least one binder at least one diluent, and optionally at least one emulsifier and/or wetting agent or mixture thereof. The binder in the wood preservative or concentrate (calculated as solids) amounts to at least 1% by weight, preferably at least 4% by weight of the composition. An alkyd resin and/or a vegetable drying oil is preferably used in the composition as the organic binder for preventing or reducing damage to beneficial insects.

Abstract: Disclosed is a preservative composition for wood and wood construction material, comprising an organic solvent base, preferably an oily or oil-like solvent, at least one insecticide, organic fungicide or wood-preserving organic chemical compound which is soluble in the solvent, and typically from about 0.005 to 0.1% by weight, and more preferably between about 0.01 and 0.03% by weight, of at least one organic lithium compound soluble in the solvent, preferably lithium naphthenate or lithium octoate. The lithium compound provides also a marking effect for the compositions during application and subsequent thereto.