Poor Alkali Resistance

alkali

Definition

Colour loss and overall deterioration of paint film on fresh masonry.

Causes

  • Applying oil-based or vinyl water-based paints to new masonry that has not fully cured

Solutions

  • Allow fresh masonry surfaces to cure for at least 30 days before painting. If this is not possible, use a high-quality, alkali-resistant primer.
  • Test alkalinity of the surface with phenolphthalein or a pH pencil.
  • Paint with a high-quality water-based paint and avoid colours that are alkali-sensitive.

Please note that these suggestions are provided as a service to you. We are unable to guarantee or be responsible for the results obtained by these procedures. If you have additional questions, ask any of our expert sales associates.

Credit: Dunn Edwards Paints