Scrape off as much as you can and let it dry-out naturally, which could take a long time, before attempting to redecorate. Eventually I repainted with a water based masonry paint. Every year since then the paint has bubbled and I have had to scrape and repaint. Allows painting of new render finishes and re-pointing repairs without alkaline contamination of the paint, which would otherwise delay painting by up to 2 months. Regular masonry paint is formulated to allow small levels of moisture to escape through evaporation. It’s important, therefore, to avoid the use of sealers or primers unless absolutely necessary.

I would not normally advise painting since this is going to present yet another barrier to any trapped moisture evaporating away naturally without causing further damage. If this be the case then scrape off any loos paint, allow to dry out over a period of a few weeks and paint again. You may well find this is an ongoing process or it may be isolated to one or two problem areas. Using a stabiliser where not absolutely necessary can impede the performance of any subsequent coats because it isn’t ‘breathable’ and may keep any natural moisture trapped beneath the wall’s surface.Kingfisher “Weatherflex Stabilising Solution” is available in 5 litre plastic containers. It should be stored in a cool, dry area, AVOID frost and direct sunlight. Shelf life of the product in, unopened sealed containers is 12 months.

P = A T P A − ( A T P B ) ( R + B T P B ) − 1 ( B T P A ) + Q . {\displaystyle P=A For our situation it is a little too soon to tell the success of Lakeland’s stabilising solution on our bathroom problem wall area. This one wall area (a small cluster of patches) is particularly troublesome with a gradual peeling and bubbling appearance (under the painted surface) And this taking time to reappear once you cover with a fresh coat of paint. However what we have noticed is the Lakeland’s stabilising solution is not only pleasant and odourless —and oddly almost as transparent as tap water—and you're not sure if this only a water that you’re applying : ) However a noticeable difference is apparent once we painted over Lakeland's stabilising solution with white pigmented organic emulsion paint There seems to be a far more opaque surface quality that seems to suggest that not only is Lakeland's stabilising solution useful for troublesome unstable or damp patches on many types of wall surfaces but also this medium improves the colour density of the applied painted areas. Normally, masonry walls can be primed with a thinned solution of water-based masonry paint. But, sometimes, the surface can be loose and/or powdery and this can cause problems.

Introduction

Dry and chalky areas can sometimes be primed with a watered down coat. But if the area has already been treated with a stabilising solution I would paint over this with unthinned masonry paint. In such cases, I always recommend that the wall is left exposed to weather for at least 12 months prior to painting. I am planning to go over the loose areas with a wire brush and paint scraper. Would you say that it would be best to go over the areas that have the white dust build up with a stabilising solution, as the old paint is very flaky in these areas? Stabilises and hardens “friable” masonry or masonry surfaces which may have “gone soft” due to extreme weathering.