Using an accelerated laboratory method to evaluate Aureobasidium pullulans colonization on painted surfaces and underlying wood substrate

IRG/WP 12-20480

C Schauwecker, L Burns, A Preston

Mold growth on painted surfaces can lead to premature paint film failure and is unsightly. Aureobasidium pullulans has been identified as a major cause of black stain on surfaces painted with acrylic or latex paints. In this study, an accelerated laboratory method developed by Zabel and Horner (1981) was used with modifications to the type of agar used and sample evaluation methods. A study was also carried out with treated pine material to determine if modifications in the preservative formulation could impact mold colonization on painted surfaces. The results show that the test method produces rapid colonization of painted surfaces and that the underlying wood treatment can impact mold growth on the paint film.

Keywords: Aureobasidium pullulans, coatings, isothiazoIone, mold, mold inhibitor, paint, Pinus ponderosa, southern pine, triazole

Conference: 12-05-06/10 Kuala Lumpur, Malaysia

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