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Title: Comparison of Traditional Methods for Testing Paint Service Life With New Methods for Service Life Predictions

Source: In: IUFRO Working party 5-04.12 3rd international symposium on surfacing and finishing of wood; 2004 November 24-26; Kyoto, Japan. Kyoto, Japan: IUFRO: 166-190.

Author(s)Williams, Lacher, Winandy, Halpin, Feist

Publication Year: 2004  View PDF »

Category: Journal Articles

Abstract: Western redcedar siding was 'preweathered' by placing it outdoors for 1, 2, 4, 8, or 16 weeks prior to being painted. Panels were painted following the preweathering and tested for paint adhesion. The of time these panels were exposed (preweathered) directly affected paint adhesion. As much as 50% paint adhesion loss was shown for specimens preweathered for 16 weeks. For matching panels that were painted and exposed outdoors, the longer the panels were preweathered, the shorter the service life ofthe paint: The paint on panels preweathered for 16 weeks began to flake and peel after 4 to 5 years; for 8 weeks, after 7 to 8 years; for 4 weeks, after 9 to 10 years; for 2 weeks, after 10 to 11 years; and for 1 week, after 13 years. Unexposed controls were still in almost perfect condition after 17 years of exposure, This work spanned 17 years-theremust be a more timely means of getting this kind of information.

Keywords: Paint, testing, deterioration, weathering, adhesion, sealing compounds, durability, western redcedar, decay, service life, exposure tests

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 534 kb(s)

Date posted: 04/05/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 27942

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