Product Description
Recent developments in wood priming practice in New Zealand have been moves away from lead pigments in primers and oil-based paint systems. New practices include the use of acrylic and oil-alkyd resins for wood primers and overcoat systems. Finger-jointed weatherboards and priming by machine at the mill are also relatively recent developments.
This report describes a testing programme using a range of New Zealand primers, both acrylic waterborne and oil-alkyd solventborne, which was designed to investigate the effect of these new practices on the performance of paint systems on timber.
The main areas looked at were:
- length of primer exposure before overcoating
- effect of finger-joints in timber
- type of topcoat
- machine application of primer
- preservative type.