Allow all new surfaces to dry out completely. Wash down previously painted surfaces with a detergent solution to remove dirt, grease, chalking paint etc. where practicable. Rinse off with clean water and allow to dry. Carefully scrape back to a firm edge all areas of poorly adhering or defective coatings and rub down thoroughly to ‘key and feather’ broken edges of existing coatings. New or sound bare surfaces should be sealed with a thinned first coat of Weathershield Smooth Masonry Paint (add up to 1 part clean water to 5 parts paint). Surfaces that remain powdery, friable or chalky after thorough preparation should be sealed with a coat of Weathershield Stabilising Primer.
Note: Do not seal sound new or bare surfaces with stabilising primer.