Previous studies have shown that the basic composition of paints, without fungicide addition, can significantly contribute to the varying microbial susceptibility of painted wood. Previously, non-weathered water-borne acrylic paints applied to wood without a primer were shown to be more susceptible to mould attack than solvent-borne alkyd paints. The present study was initiated to reveal if this difference was mainly an effect of the type of binder, solvent or surfactant used. Laboratory made paints, including water-borne acrylic paints, a solvent-borne acrylic paint, a solvent borne alkyd paint and alkyd emulsion paints, with known compositions were tested. It was found that the type of binder was more important than the solvent. The use of different surfactants could lead to different susceptibility of alkyd emulsion paints on wood.

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