TREATMENTS TO MINIMIZE EXTRACTIVES STAIN IN WESTERN RED CEDAR

Rod Stirling, Paul I. Morris

Abstract


Under certain conditions involving uneven exposure to weather, stains related to the extractives can reduce the aesthetic appeal of western red cedar in exterior applications such as fence boards, siding, and sidewall shingles. Selected chemical treatments were evaluated for their ability to inhibit the formation of extractives stain. DDACarbonate, alkyl amine oxide, and combinations thereof delayed extractives stain formation in an accelerated field test, with higher loadings having greater effect.

Keywords


Alkyl amine oxide; DDACarbonate; Discoloration; Extractives; Stain; Thuja plicata; Western red cedar; Wood products

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