The aim of this study was to determine the effectiveness against decay and termite attack of pine sapwood treated with pure and modified DMDHEU in a field test according to European Standard EN 252. Some of the treatments tested were able to increase, within the period of the test reported (30 months), the resistance of the wood both to micro-organisms and termites. The curing process seems to be the key factor for this increase as WPG (weight percent gain) of the modified wood alone was not sufficient for the prediction of the long-term performance.

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