Effective water leakage wall repair combines crack sealing and surface waterproofing for lasting results. Steps: trace leak (often from balcony overflow or porous bricks), chisel V-grooves in cracks, clean thoroughly, fill with flexible polyurethane sealant (Supex PU 25 or similar), prime the surface, then roll on fiber-reinforced elastomeric membrane in multiple layers. For active le... https://shakuraconstruction.sg/services/water-leakage-wall-repair/