I have a sand and cement rendered exterior wall which has been repaired. I intend to repaint the whole thing with Weathertex AP77. What primer do I need for the repaired sections?
Assuming the repaired areas are not loose or friable, no primer would be required, only to thin the first coat of Wethertex AP77, from our masonry paints range, by 10% with clean water.
If the repaired areas are unstable Wethertex ST1 Quick Dry Stabilising Primer should be used.