Lime burn is a condition that occurs when the alkalinity in fresh masonry causes the breakdown of the paint binder, resulting in colour loss and overall deterioration of the paint film.
Solventborne or alkyd paints, and vinyl-acetate-based acrylic paints are vulnerable to alkaline attack if applied over fresh masonry. Where possible, avoid the use of these products on masonry.
Fresh masonry is likely to contain lime (calcium hydroxide). Until the lime has a chance to react with carbon dioxide from the air, the alkalinity of the masonry remains so high that it can attack the binders of unsuitable paints.
To avoid lime burn, fresh masonry surfaces should be coated in Resene Limelock to lock in any free lime present in the substrate.
Resene Paint and Decorating Problems Solver
Learn more about typical painting problems and situations you may find when decorating. Also, understanding paint hazards and essential precautions - putting your safety first!
Can't find what you're looking for? Ask us!
Colours shown on this website are a representation only. Please refer to the actual paint or product sample. Resene colour charts, testpots and samples are available for ordering online. See measurements/conversions for more details on how electronic colour values are achieved.