After the development of new products they need to be field-tested to assess their efficacy under diverse conditions of climate, comparing them with a preservative with proven efficacy. In some testing sites, decay occurs very slowly. The solution would be to bring these tests to locations that are conducive to biodeterioration, like tropical climates. Tropical sites provide higher temperature and humidity, which are excellent environmental conditions for wood biodegradation. Adaptations of four internationally-recognized standards were used to evaluate the effectiveness of wood preservatives products softwood in a species with no natural resistance (Pinus sp.). The assessment consisted of the simulation of aggressive environment for wooden structures used outdoors, such as door frames and window frames, decks and facades accompanied by a protective varnish coating in half of the specimens. This paper presents the preliminary results, after one year of exposure, of new wood preservative products developed for specific Brazilian climatic conditions. Due to the short duration of the test to this date, there are no significant variations among the performances of the various products. During one year there was a reduction in the deterioration rate caused by fungi and termites.

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