We have a solution that without breaking of plaster of external walls we can give a waterproofing solution by application of paint. We also use elastomeric paint, polyurethanes, polysulfides and polymers of various companies for external wall waterproofing. Surface preparation and applying hydrophobic, breathable sealer treatment that impregnates deep inside the surface due to low surface tension and is resistant to the alkalinity of cement plastered surface. The treatment will bridge the hairline cracks and prevent ingress of moisture and capillary condensation on the surface and increase the life of the paint. It will also prevent the hairline cracks from becoming more visible due to accumulation of dirt and give better bonding to the paint. Impregnation with oligomeric alkyl alkoxy.