Tests of Some Superficial Treatments of Exposed Wood Surfaces for Their Protection Against Fungus Attack

A limited number of preservatives, sealers, and water repellents were evaluated for their effectiveness in reducing wood decay. Small specimens of treated Sitka spruce and Liquidambar styraciflua L. were exposed to specific decay fungi for 4 months. Decay was measured by weight loss. A combination of water repellent and pentachlorophenol preservative provided a large amount of protection. Sealers incorporating pentachlorophenol were comparable to that of the water repellent preservative. Maximum protection was obtained by double treatments with a preservative or a water-repellent followed by a preservative sealer.

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