Water-repellent preservative treatment of brick molding prior to factory priming improves paint service life

Abstract

One end of each piece of brick molding (about 35 mm long) was dipped in a water-repellent preservative (WRP). Following the WRP treatment, the sections were divided into two groups and painted with one of two different primers formulated to be typical of factory-applied primers. Each of the primed groups was further divided into four groups to determine the effect of primer weathering on paint service Iife. The primed moldings were exposed without a top coat for about 0,3,6, or 9 months 15 km west of Madison, Wisconsin. Alkyd-oil or acrylic-latex top coats were field-applied and the moldings were evaluated over 3 years for flaking and cracking of the paint. It was found that pretreatment of the specimens with WRP greatly improved the paint performance. Weathering the primer decreased the paint performance for the alkyd-oil top coats without the WRP pretreatment but not for the acrylic-latex top coats. The acrylic-latex top coats had better service life than the alkyd-oil top coats.

Citation

Williams, R. Sam; Ross, Alan S.; Sotos, Peter; Cheeks, Chuck. 2001. Water-repellent preservative treatment of brick molding prior to factory priming improves paint service life. Proceedings : Ninety-seventh Annual Meeting of the American Wood-Preservers'' Association ... Minneapolis, Minnesota, May 20-23, 2001. Granbury, Tex. : The Association, c2001: Pages 65-67.