Are you facing dampness or any other water related issues in your building? The solution for your problem is Star Water Shield - a complete water and fungus proof coating.
Star Water Shield can repel water droplets as small as 0.004 Microns, because of it's Ultra Hydrophobic Nature. Star Water Shield is formulated with proprietary chemicals and advanced technology to address dampness, water leakage, wall seepage, ugly stains and paint peeling that affect the walls of your home.
Use sand paper and high pressure water. Get rid of black color, fungus & dist.
Apply the paint 2 times (wet on wet), to ensure the surface is covered uniformly
Allow the surface to dry for 24 hours