Buildings across Karachi, Hyderabad, Sukkur, and coastal Balochistan face twin enemies: intense summer thermal expansion on concrete roofs followed by monsoon downpours, plus high groundwater salinity causing white powdery kalar (efflorescence) on walls.
1. Sunken Bathrooms & Wet Zones: Seal Before You Tile
Tile grout alone is water-resistant, not a structural waterproof membrane. Before laying bathroom screed or floor tiles, clean the concrete slab and apply two perpendicular brush coats of RHR Aqua Shield, turning the coating 6–12 inches up the perimeter walls.
2. Stopping Coastal Wall Dampness & Efflorescence (Kalar)
When salty moisture rises through brick or plaster capillaries, paint blisters within months. Apply deep-penetrating Patlo Sealer onto bare clean masonry/plaster to seal capillary pores while letting trapped vapor escape.
3. Heavy-Duty Roof Slabs & Parapet Joints
For exposed roof terraces and parapet junctions, apply Readymix Patlo compound over cleaned cracks and joints before protective screed or rooftop tiling with ReadyMix Tile Bond.