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espanolSe evaluaron propiedades fisicas, mecanicas y esteticas de tableros estructurales comerciales contrachapados (plywood) y tableros de virutas orientadas (OSB). Estos estaban recubiertos con dos protectores superficiales comerciales para madera que no forman pelicula, y se mantuvieron a la intemperie durante un ano en campos de prueba, segun norma ASTM D 1006:1973. Se determino estadisticamente la perdida de propiedades mecanicas y se evaluo como se ven influenciadas las propiedades fisicas y esteticas por el tiempo de exposicion. Las conclusiones principales fueron que la proteccion de los recubrimientos utilizados no fue efectiva, no se cumplio la expectativa, de que los no formadores de pelicula protejan la superficie y que no se presenten los defectos tipicos de agrietamiento, erosion y decoloracion. No se observo diferencias cualitativas entre ambos protectores, por lo que no se justifica el mayor precio de uno de ellos. EnglishPhysical, mechanical and aesthetic properties were evaluated on structural boards as plywood and oriented strand board (OSB). The boards were covered by two commercial superficial protectors for wood that do not form films, and were maintained outside with no other protection during one year, in test field, according to the ASTM norm D1006:1973. Loss of mechanical properties was statistically determined and the influence of exposure time on the physical and aesthetic properties were evaluated. The main conclusions were that the protection of the used coverings was not effective and the main hypothesis that the non-forming film protect the surface and that typical defects of cracking, erosion and discoloration do not appear, was not proved. It was not observed qualitative differences between both protectors, so the higher price of one of them is not justified.

Efectos de dos Protectores Superficiales en las Propiedades de Tableros de Madera después de un Año de Exposición a la Intemperie