A solvent based primer specially formulated to seal unstable areas which remain powdery and chalky after the surface has been thoroughly prepared for painting with dulux trade weathershield masonry paints up to 12m per litre on most surfaces application coverage coverage 12m per litre touch dry 8 12 hours dependent upon temperature humidity recoatable 16 24 hours thinning this product should not be thinned key benefits stabilises powdery masonry surfaces ready for use use only on dry